diff --git a/doc-source/api/pyproject-parser.rst b/doc-source/api/pyproject-parser.rst
index 3fecf59..52d13e2 100644
--- a/doc-source/api/pyproject-parser.rst
+++ b/doc-source/api/pyproject-parser.rst
@@ -16,7 +16,7 @@ Parser for ``pyproject.toml``.
 	:autosummary-sections: Data
 
 .. autoattrs:: pyproject_parser.PyProject
-	:exclude-members: __ge__,__gt__,__le__,__lt__,__ne__
+	:exclude-members: __ge__,__gt__,__le__,__lt__,__ne__,__repr__,__eq__
 	:no-autosummary:
 
 .. autoclass:: pyproject_parser.PyProjectTomlEncoder
diff --git a/doc-source/api/type_hints.rst b/doc-source/api/type_hints.rst
index d93775e..6b28808 100644
--- a/doc-source/api/type_hints.rst
+++ b/doc-source/api/type_hints.rst
@@ -2,5 +2,5 @@
 :mod:`pyproject_parser.type_hints`
 ===================================
 
-.. autosummary-widths:: 1/5
+.. autosummary-widths:: 1/3
 .. automodule:: pyproject_parser.type_hints
diff --git a/pyproject_parser/__init__.py b/pyproject_parser/__init__.py
index ab8fee1..7890ad8 100644
--- a/pyproject_parser/__init__.py
+++ b/pyproject_parser/__init__.py
@@ -63,11 +63,12 @@
 
 # this package
 from pyproject_parser.classes import License, Readme, _NormalisedName
-from pyproject_parser.parsers import BuildSystemParser, PEP621Parser
+from pyproject_parser.parsers import BuildSystemParser, DependencyGroupsParser, PEP621Parser
 from pyproject_parser.type_hints import (  # noqa: F401
 		Author,
 		BuildSystemDict,
 		ContentTypes,
+		DependencyGroupsDict,
 		ProjectDict,
 		_PyProjectAsTomlDict
 		)
@@ -239,23 +240,29 @@ class PyProject:
 
 	:param build_system:
 
-	.. autosummary-widths:: 23/64
+	.. versionchanged:: 0.13.0  Added ``dependency_groups`` and ``dependency_groups_table_parser`` properties.
+
+	.. autosummary-widths:: 4/10
 
 	.. autoclasssumm:: PyProject
 		:autosummary-sections: Methods
-		:autosummary-exclude-members: __ge__,__gt__,__le__,__lt__,__ne__,__init__
+		:autosummary-exclude-members: __ge__,__gt__,__le__,__lt__,__ne__,__init__,__repr__,__eq__
 
 	.. latex:clearpage::
 
+	.. autosummary-widths:: 1/2
+
 	.. autoclasssumm:: PyProject
 		:autosummary-sections: Attributes
 
-	.. latex:vspace:: 10px
 	"""
 
 	#: Represents the :pep:`build-system table <518#build-system-table>` defined in :pep:`517` and :pep:`518`.
 	build_system: Optional[BuildSystemDict] = attr.ib(default=None)
 
+	#: Represents the :pep:`dependency groups table <735#specification>` defined in :pep:`735`.
+	dependency_groups: Optional[DependencyGroupsDict] = attr.ib(default=None)
+
 	#: Represents the :pep621:`project table <table-name>` defined in :pep:`621`.
 	project: Optional[ProjectDict] = attr.ib(default=None)
 
@@ -268,6 +275,14 @@ class PyProject:
 	to parse the :pep:`build-system table <518#build-system-table>` with.
 	"""
 
+	dependency_groups_table_parser: ClassVar[DependencyGroupsParser] = DependencyGroupsParser()
+	"""
+	The :class:`~dom_toml.parser.AbstractConfigParser`
+	to parse the :pep:`dependency groups table <735#specification>` with.
+
+	.. versionadded:: 0.13.0
+	"""
+
 	project_table_parser: ClassVar[PEP621Parser] = PEP621Parser()
 	"""
 	The :class:`~dom_toml.parser.AbstractConfigParser`
@@ -313,6 +328,7 @@ def load(
 		keys = set(config.keys())
 
 		build_system_table: Optional[BuildSystemDict] = None
+		dependency_groups_table: Optional[DependencyGroupsDict] = None
 		project_table: Optional[ProjectDict] = None
 		tool_table: Dict[str, Dict[str, Any]] = {}
 
@@ -323,6 +339,12 @@ def load(
 						)
 				keys.remove("build-system")
 
+			if "dependency-groups" in config:
+				dependency_groups_table = cls.dependency_groups_table_parser.parse(
+						config["dependency-groups"], set_defaults=set_defaults
+						)
+				keys.remove("dependency-groups")
+
 			if "project" in config:
 				project_table = cls.project_table_parser.parse(config["project"], set_defaults=set_defaults)
 				keys.remove("project")
@@ -336,7 +358,7 @@ def load(
 						tool_table[tool_name] = cls.tool_parsers[tool_name].parse(tool_subtable)
 
 		if keys:
-			allowed_top_level = ("build-system", "project", "tool")
+			allowed_top_level = ("build-system", "dependency-groups", "project", "tool")
 
 			for top_level_key in sorted(keys):
 				if top_level_key in allowed_top_level:
@@ -355,6 +377,7 @@ def load(
 
 		return cls(
 				build_system=build_system_table,
+				dependency_groups=dependency_groups_table,
 				project=project_table,
 				tool=tool_table,
 				)
@@ -375,6 +398,7 @@ def dumps(
 				"build-system": self.build_system,
 				"project": self.project,
 				"tool": self.tool,
+				"dependency-groups": self.dependency_groups,
 				}
 
 		if toml_dict["project"] is not None:
@@ -478,6 +502,8 @@ def from_dict(cls: Type[_PP], d: Mapping[str, Any]) -> _PP:
 		for key, value in d.items():
 			if key == "build-system":
 				key = "build_system"
+			elif key == "dependency-groups":
+				key = "dependency_groups"
 
 			kwargs[key] = value
 
@@ -494,4 +520,5 @@ def to_dict(self) -> MutableMapping[str, Any]:
 				"build_system": self.build_system,
 				"project": self.project,
 				"tool": self.tool,
+				"dependency_groups": self.dependency_groups,
 				}
diff --git a/pyproject_parser/parsers.py b/pyproject_parser/parsers.py
index 9751a6c..b5cacfc 100644
--- a/pyproject_parser/parsers.py
+++ b/pyproject_parser/parsers.py
@@ -49,12 +49,13 @@
 
 # this package
 from pyproject_parser.classes import License, Readme, _NormalisedName
-from pyproject_parser.type_hints import Author, BuildSystemDict, ProjectDict
+from pyproject_parser.type_hints import Author, BuildSystemDict, DependencyGroupsDict, ProjectDict
 from pyproject_parser.utils import PyProjectDeprecationWarning, content_type_from_filename, render_readme
 
 __all__ = [
 		"RequiredKeysConfigParser",
 		"BuildSystemParser",
+		"DependencyGroupsParser",
 		"PEP621Parser",
 		]
 
@@ -258,6 +259,60 @@ def parse(  # type: ignore[override]
 		return cast(BuildSystemDict, parsed_config)
 
 
+class DependencyGroupsParser(AbstractConfigParser):
+	"""
+	Parser for the :pep:`dependency groups table <735#specification>` table from ``pyproject.toml``.
+
+	.. versionadded:: 0.13.0
+	"""  # noqa: RST399
+
+	table_name: ClassVar[str] = "dependency-groups"
+
+	@property
+	def keys(self) -> List[str]:
+		"""
+		The keys to parse from the TOML file.
+		"""
+
+		return []
+
+	@staticmethod
+	def parse_group(config: TOML_TYPES) -> List[Union[str, Dict[str, str]]]:
+		"""
+		Parse a group from the TOML configuration.
+
+		:param config:
+		"""
+
+		if isinstance(config, list):
+			return config
+
+		raise BadConfigError("A dependency group must be an array.")
+
+	def parse(
+			self,
+			config: Dict[str, TOML_TYPES],
+			set_defaults: bool = False,
+			) -> DependencyGroupsDict:
+		"""
+		Parse the TOML configuration.
+
+		:param config:
+		:param set_defaults: If :py:obj:`True`, the values in
+			:attr:`self.defaults <dom_toml.parser.AbstractConfigParser.defaults>` and
+			:attr:`self.factories <dom_toml.parser.AbstractConfigParser.factories>`
+			will be set as defaults for the returned mapping.
+
+		:rtype:
+
+		.. latex:clearpage::
+		"""
+
+		parsed_config = {key: self.parse_group(value) for key, value in config.items()}
+
+		return cast(DependencyGroupsDict, parsed_config)
+
+
 class PEP621Parser(RequiredKeysConfigParser):
 	"""
 	Parser for :pep:`621` metadata from ``pyproject.toml``.
@@ -896,10 +951,6 @@ def parse_entry_points(self, config: Dict[str, TOML_TYPES]) -> Dict[str, Dict[st
 			nbval = "nbval.plugin"
 
 		:param config: The unparsed TOML config for the :pep621:`project table <table-name>`.
-
-		:rtype:
-
-		.. latex:clearpage::
 		"""
 
 		entry_points = config["entry-points"]
diff --git a/pyproject_parser/type_hints.py b/pyproject_parser/type_hints.py
index dcc1d70..367985d 100644
--- a/pyproject_parser/type_hints.py
+++ b/pyproject_parser/type_hints.py
@@ -27,7 +27,7 @@
 #
 
 # stdlib
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, List, Optional, Union
 
 # 3rd party
 from packaging.markers import Marker
@@ -40,6 +40,8 @@
 
 __all__ = [
 		"BuildSystemDict",
+		"IncludeGroupDict",
+		"DependencyGroupsDict",
 		"Dynamic",
 		"ProjectDict",
 		"Author",
@@ -57,6 +59,20 @@
 				}
 		)
 
+IncludeGroupDict = TypedDict("IncludeGroupDict", {"include-group": str})
+"""
+:class:`typing.TypedDict`.
+
+.. versionadded:: 0.13.0
+"""
+
+DependencyGroupsDict = Dict[str, List[Union[str, IncludeGroupDict]]]
+"""
+The return type from the :class:`~.DependencyGroupsParser` class.
+
+.. versionadded:: 0.13.0
+"""
+
 #: Type hint for the :pep621:`dynamic` field defined in :pep:`621`.
 Dynamic = Literal[
 	"name",
@@ -130,5 +146,10 @@ class ReadmeDict(TypedDict, total=False):
 
 _PyProjectAsTomlDict = TypedDict(
 		"_PyProjectAsTomlDict",
-		{"build-system": Optional[BuildSystemDict], "project": Optional[ProjectDict], "tool": Dict[str, Any]},
+		{
+				"build-system": Optional[BuildSystemDict],
+				"project": Optional[ProjectDict],
+				"tool": Dict[str, Any],
+				"dependency-groups": Optional[DependencyGroupsDict]
+				},
 		)
diff --git a/tests/conftest.py b/tests/conftest.py
index 18802d2..011d8b0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -2,6 +2,7 @@
 from typing import Callable, Type, TypeVar, Union
 
 # 3rd party
+from dom_toml.decoder import InlineTableDict
 from packaging.markers import Marker
 from packaging.requirements import Requirement
 from packaging.specifiers import SpecifierSet
@@ -46,3 +47,11 @@ def represent_readme_or_license(  # noqa: MAN002
 		data: Union[Readme, License],
 		):
 	return dumper.represent_dict(data.to_dict())
+
+
+@_representer_for(InlineTableDict)
+def represent_inline_table(  # noqa: MAN002
+		dumper: RegressionYamlDumper,
+		data: InlineTableDict,
+		):
+	return dumper.represent_dict(dict(data))
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 7fc2e7c..50a6287 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -27,6 +27,15 @@
 from pyproject_parser.cli import ConfigTracebackHandler
 from tests.test_dumping import COMPLETE_UNDERSCORE_NAME, UNORDERED
 
+COMPLETE_DEPENDENCY_GROUPS = COMPLETE_A + """
+
+[dependency-groups]
+test = ["pytest", "coverage"]
+docs = ["sphinx", "sphinx-rtd-theme"]
+typing = ["mypy", "types-requests"]
+typing-test = [{include-group = "typing"}, {include-group = "test"}, "useful-types"]
+"""
+
 
 @pytest.mark.parametrize(
 		"toml_string",
@@ -37,6 +46,7 @@
 				pytest.param(COMPLETE_PROJECT_A, id="COMPLETE_PROJECT_A"),
 				pytest.param(UNORDERED, id="UNORDERED"),
 				pytest.param(COMPLETE_UNDERSCORE_NAME, id="COMPLETE_UNDERSCORE_NAME"),
+				pytest.param(COMPLETE_DEPENDENCY_GROUPS, id="COMPLETE_DEPENDENCY_GROUPS"),
 				]
 		)
 @pytest.mark.parametrize("show_diff", [True, False])
@@ -177,7 +187,7 @@ def test_check_extra_deprecation_warning(
 						),
 				pytest.param(
 						"[coverage]\nomit = 'demo.py'\n[flake8]\nselect = ['F401']",
-						"Unexpected top-level key 'coverage'. Only 'build-system', 'project' and 'tool' are allowed.",
+						"Unexpected top-level key 'coverage'. Only 'build-system', 'dependency-groups', 'project' and 'tool' are allowed.",
 						id="top-level",
 						),
 				pytest.param(
diff --git a/tests/test_cli_/test_check_error_caught_top_level_.txt b/tests/test_cli_/test_check_error_caught_top_level_.txt
index ea9e316..725f931 100644
--- a/tests/test_cli_/test_check_error_caught_top_level_.txt
+++ b/tests/test_cli_/test_check_error_caught_top_level_.txt
@@ -1,3 +1,3 @@
-BadConfigError: Unexpected top-level key 'coverage'. Only 'build-system', 'project' and 'tool' are allowed.
+BadConfigError: Unexpected top-level key 'coverage'. Only 'build-system', 'dependency-groups', 'project' and 'tool' are allowed.
     Use '--traceback' to view the full traceback.
 Aborted!
diff --git a/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.diff b/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.diff
new file mode 100644
index 0000000..006c1ea
--- /dev/null
+++ b/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.diff
@@ -0,0 +1 @@
+Reformatting 'pyproject.toml'
diff --git a/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.toml b/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.toml
new file mode 100644
index 0000000..04283c5
--- /dev/null
+++ b/tests/test_cli_/test_reformat_False_COMPLETE_DEPENDENCY_GROUPS_.toml
@@ -0,0 +1,34 @@
+[build-system]
+requires = [ "whey",]
+build-backend = "whey"
+
+[project]
+name = "whey"
+version = "2021.0.0"
+description = "A simple Python wheel builder for simple projects."
+keywords = [ "build", "distribution", "packaging", "pep517", "pep621", "sdist", "wheel",]
+dependencies = [ 'django>2.1; os_name != "nt"', 'django>2.0; os_name == "nt"', "gidgethub[httpx]>4.0.0", "httpx",]
+dynamic = [ "classifiers", "requires-python",]
+
+[[project.authors]]
+name = "Dominic Davis-Foster"
+email = "dominic@davis-foster.co.uk"
+
+[project.urls]
+Homepage = "https://whey.readthedocs.io/en/latest"
+Documentation = "https://whey.readthedocs.io/en/latest"
+"Issue Tracker" = "https://github.com/repo-helper/whey/issues"
+"Source Code" = "https://github.com/repo-helper/whey"
+
+[tool.whey]
+base-classifiers = [ "Development Status :: 4 - Beta",]
+python-versions = [ "3.6", "3.7", "3.8", "3.9", "3.10",]
+python-implementations = [ "CPython", "PyPy",]
+platforms = [ "Windows", "macOS", "Linux",]
+license-key = "MIT"
+
+[dependency-groups]
+test = [ "pytest", "coverage",]
+docs = [ "sphinx", "sphinx-rtd-theme",]
+typing = [ "mypy", "types-requests",]
+typing-test = [ { include-group = "typing" }, { include-group = "test" }, "useful-types",]
diff --git a/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.diff b/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.diff
new file mode 100644
index 0000000..9f8d382
--- /dev/null
+++ b/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.diff
@@ -0,0 +1,41 @@
+Reformatting 'pyproject.toml'
+--- pyproject.toml	(original)
++++ pyproject.toml	(reformatted)
+@@ -6,18 +6,13 @@
+ name = "whey"
+ version = "2021.0.0"
+ description = "A simple Python wheel builder for simple projects."
+-keywords = [ "pep517", "pep621", "build", "sdist", "wheel", "packaging", "distribution",]
++keywords = [ "build", "distribution", "packaging", "pep517", "pep621", "sdist", "wheel",]
++dependencies = [ 'django>2.1; os_name != "nt"', 'django>2.0; os_name == "nt"', "gidgethub[httpx]>4.0.0", "httpx",]
+ dynamic = [ "classifiers", "requires-python",]
+-dependencies = [
+-  "httpx",
+-  "gidgethub[httpx]>4.0.0",
+-  "django>2.1; os_name != 'nt'",
+-  "django>2.0; os_name == 'nt'"
+-]
+
+ [[project.authors]]
++name = "Dominic Davis-Foster"
+ email = "dominic@davis-foster.co.uk"
+-name = "Dominic Davis-Foster"
+
+ [project.urls]
+ Homepage = "https://whey.readthedocs.io/en/latest"
+@@ -32,10 +27,9 @@
+ platforms = [ "Windows", "macOS", "Linux",]
+ license-key = "MIT"
+
++[dependency-groups]
++test = [ "pytest", "coverage",]
++docs = [ "sphinx", "sphinx-rtd-theme",]
++typing = [ "mypy", "types-requests",]
++typing-test = [ { include-group = "typing" }, { include-group = "test" }, "useful-types",]
+
+-[dependency-groups]
+-test = ["pytest", "coverage"]
+-docs = ["sphinx", "sphinx-rtd-theme"]
+-typing = ["mypy", "types-requests"]
+-typing-test = [{include-group = "typing"}, {include-group = "test"}, "useful-types"]
+-
diff --git a/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.toml b/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.toml
new file mode 100644
index 0000000..04283c5
--- /dev/null
+++ b/tests/test_cli_/test_reformat_True_COMPLETE_DEPENDENCY_GROUPS_.toml
@@ -0,0 +1,34 @@
+[build-system]
+requires = [ "whey",]
+build-backend = "whey"
+
+[project]
+name = "whey"
+version = "2021.0.0"
+description = "A simple Python wheel builder for simple projects."
+keywords = [ "build", "distribution", "packaging", "pep517", "pep621", "sdist", "wheel",]
+dependencies = [ 'django>2.1; os_name != "nt"', 'django>2.0; os_name == "nt"', "gidgethub[httpx]>4.0.0", "httpx",]
+dynamic = [ "classifiers", "requires-python",]
+
+[[project.authors]]
+name = "Dominic Davis-Foster"
+email = "dominic@davis-foster.co.uk"
+
+[project.urls]
+Homepage = "https://whey.readthedocs.io/en/latest"
+Documentation = "https://whey.readthedocs.io/en/latest"
+"Issue Tracker" = "https://github.com/repo-helper/whey/issues"
+"Source Code" = "https://github.com/repo-helper/whey"
+
+[tool.whey]
+base-classifiers = [ "Development Status :: 4 - Beta",]
+python-versions = [ "3.6", "3.7", "3.8", "3.9", "3.10",]
+python-implementations = [ "CPython", "PyPy",]
+platforms = [ "Windows", "macOS", "Linux",]
+license-key = "MIT"
+
+[dependency-groups]
+test = [ "pytest", "coverage",]
+docs = [ "sphinx", "sphinx-rtd-theme",]
+typing = [ "mypy", "types-requests",]
+typing-test = [ { include-group = "typing" }, { include-group = "test" }, "useful-types",]
diff --git a/tests/test_config.py b/tests/test_config.py
index 6ad8c20..819294a 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -18,7 +18,12 @@
 from shippinglabel import normalize_keep_dot
 
 # this package
-from pyproject_parser.parsers import BuildSystemParser, PEP621Parser, RequiredKeysConfigParser
+from pyproject_parser.parsers import (
+		BuildSystemParser,
+		DependencyGroupsParser,
+		PEP621Parser,
+		RequiredKeysConfigParser
+		)
 from pyproject_parser.utils import PyProjectDeprecationWarning, _load_toml
 
 
@@ -555,3 +560,46 @@ class MyConfigParser(RequiredKeysConfigParser):
 
 	assert MyConfigParser().parse({}, set_defaults=True) == {"foo": "foo-default", "bar": "bar-defaults"}
 	assert MyConfigParser().parse({"foo": "baz"}, set_defaults=True) == {"foo": "baz", "bar": "bar-defaults"}
+
+
+valid_dependency_groups_config = [
+		pytest.param("[dependency-groups]", id="empty"),
+		pytest.param('[dependency-groups]\ngroup-a = ["foo"]', id="one-group"),
+		pytest.param(
+				'[dependency-groups]\ngroup-a = ["foo"]\ngroup-b = ["foo>1.0"]\ngroup-c = ["foo<1.0"]\nall = ["foo", {include-group = "group-a"}, {include-group = "group-b"}, {include-group = "group-c"}]',
+				id="full-example"
+				),
+		]
+
+bad_dependency_groups_config = [
+		pytest.param(
+				'[dependency-groups]\ngroup-a = "foo"', BadConfigError, "A dependency group must be an array"
+				),
+		]
+
+
+@pytest.mark.parametrize("set_defaults", [True, False])
+@pytest.mark.parametrize("toml_config", valid_dependency_groups_config)
+def test_dependency_groups_parser_valid_config(
+		toml_config: str,
+		tmp_pathplus: PathPlus,
+		advanced_data_regression: AdvancedDataRegressionFixture,
+		set_defaults: bool,
+		):
+	(tmp_pathplus / "pyproject.toml").write_clean(toml_config)
+	config = DependencyGroupsParser().parse(
+			_load_toml(tmp_pathplus / "pyproject.toml")["dependency-groups"],
+			set_defaults=set_defaults,
+			)
+
+	advanced_data_regression.check(config)
+
+
+@pytest.mark.parametrize("config, expects, match", bad_dependency_groups_config)
+def test_dependency_groups_parser_errors(
+		config: str, expects: Type[Exception], match: str, tmp_pathplus: PathPlus
+		):
+	(tmp_pathplus / "pyproject.toml").write_clean(config)
+
+	with in_directory(tmp_pathplus), pytest.raises(expects, match=match):
+		DependencyGroupsParser().parse(_load_toml(tmp_pathplus / "pyproject.toml")["dependency-groups"])
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_empty_False_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_empty_False_.yml
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_empty_False_.yml
@@ -0,0 +1 @@
+{}
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_empty_True_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_empty_True_.yml
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_empty_True_.yml
@@ -0,0 +1 @@
+{}
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_False_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_False_.yml
new file mode 100644
index 0000000..f8e9b15
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_False_.yml
@@ -0,0 +1,11 @@
+all:
+- foo
+- include-group: group-a
+- include-group: group-b
+- include-group: group-c
+group-a:
+- foo
+group-b:
+- foo>1.0
+group-c:
+- foo<1.0
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_True_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_True_.yml
new file mode 100644
index 0000000..f8e9b15
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_full_example_True_.yml
@@ -0,0 +1,11 @@
+all:
+- foo
+- include-group: group-a
+- include-group: group-b
+- include-group: group-c
+group-a:
+- foo
+group-b:
+- foo>1.0
+group-c:
+- foo<1.0
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_False_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_False_.yml
new file mode 100644
index 0000000..7b70ec0
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_False_.yml
@@ -0,0 +1,2 @@
+group-a:
+- foo
diff --git a/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_True_.yml b/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_True_.yml
new file mode 100644
index 0000000..7b70ec0
--- /dev/null
+++ b/tests/test_config_/test_dependency_groups_parser_valid_config_one_group_True_.yml
@@ -0,0 +1,2 @@
+group-a:
+- foo
diff --git a/tests/test_pyproject_class.py b/tests/test_pyproject_class.py
index fffa367..714da50 100644
--- a/tests/test_pyproject_class.py
+++ b/tests/test_pyproject_class.py
@@ -17,8 +17,24 @@
 # this package
 from pyproject_parser import PyProject
 
+COMPLETE_DEPENDENCY_GROUPS = COMPLETE_A + """
 
-@pytest.mark.parametrize("toml_config", [*valid_pep621_config, *valid_buildsystem_config])
+[dependency-groups]
+test = ["pytest", "coverage"]
+docs = ["sphinx", "sphinx-rtd-theme"]
+typing = ["mypy", "types-requests"]
+typing-test = [{include-group = "typing"}, {include-group = "test"}, "useful-types"]
+"""
+
+
+@pytest.mark.parametrize(
+		"toml_config",
+		[
+				*valid_pep621_config,
+				*valid_buildsystem_config,
+				pytest.param(COMPLETE_DEPENDENCY_GROUPS, id="complete-dependency-groups"),
+				]
+		)
 def test_valid_config(
 		toml_config: str,
 		tmp_pathplus: PathPlus,
@@ -81,13 +97,13 @@ def test_valid_config_resolve_files(
 				pytest.param(
 						'banana = "fruit"\n[project]\nname = "food"',
 						BadConfigError,
-						"Unexpected top-level key 'banana'. Only 'build-system', 'project' and 'tool' are allowed.",
+						"Unexpected top-level key 'banana'. Only 'build-system', 'dependency-groups', 'project' and 'tool' are allowed.",
 						id="unexpected_top_level"
 						),
 				pytest.param(
 						"[coverage]\nomit = 'demo.py'\n[flake8]\nselect = ['F401']",
 						BadConfigError,
-						"Unexpected top-level key 'coverage'. Only 'build-system', 'project' and 'tool' are allowed.",
+						"Unexpected top-level key 'coverage'. Only 'build-system', 'dependency-groups', 'project' and 'tool' are allowed.",
 						id="top-level",
 						),
 				pytest.param(
diff --git a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_A_.yml b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_A_.yml
index b83c998..5e0509a 100644
--- a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_A_.yml
+++ b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_A_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_B_.yml b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_B_.yml
index fd275d9..6695199 100644
--- a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_B_.yml
+++ b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_B_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_PROJECT_A_.yml b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_PROJECT_A_.yml
index 6ca3e8e..e02a281 100644
--- a/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_PROJECT_A_.yml
+++ b/tests/test_pyproject_class_/test_custom_pyproject_class_COMPLETE_PROJECT_A_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: hi@pradyunsg.me
diff --git a/tests/test_pyproject_class_/test_valid_config_COMPLETE_A_.yml b/tests/test_pyproject_class_/test_valid_config_COMPLETE_A_.yml
index 1e45862..bcc0487 100644
--- a/tests/test_pyproject_class_/test_valid_config_COMPLETE_A_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_COMPLETE_A_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_valid_config_COMPLETE_B_.yml b/tests/test_pyproject_class_/test_valid_config_COMPLETE_B_.yml
index 90fd5d2..224f469 100644
--- a/tests/test_pyproject_class_/test_valid_config_COMPLETE_B_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_COMPLETE_B_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_valid_config_COMPLETE_PROJECT_A_.yml b/tests/test_pyproject_class_/test_valid_config_COMPLETE_PROJECT_A_.yml
index 6ca3e8e..e02a281 100644
--- a/tests/test_pyproject_class_/test_valid_config_COMPLETE_PROJECT_A_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_COMPLETE_PROJECT_A_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: hi@pradyunsg.me
diff --git a/tests/test_pyproject_class_/test_valid_config_authors_.yml b/tests/test_pyproject_class_/test_valid_config_authors_.yml
index 9827ce8..e59653f 100644
--- a/tests/test_pyproject_class_/test_valid_config_authors_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_authors_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: hi@pradyunsg.me
diff --git a/tests/test_pyproject_class_/test_valid_config_backend_path_.yml b/tests/test_pyproject_class_/test_valid_config_backend_path_.yml
index eebef31..9b81fc6 100644
--- a/tests/test_pyproject_class_/test_valid_config_backend_path_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_backend_path_.yml
@@ -4,5 +4,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_backend_paths_.yml b/tests/test_pyproject_class_/test_valid_config_backend_paths_.yml
index 2b48bde..1d9fbde 100644
--- a/tests/test_pyproject_class_/test_valid_config_backend_paths_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_backend_paths_.yml
@@ -5,5 +5,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_classifiers_.yml b/tests/test_pyproject_class_/test_valid_config_classifiers_.yml
index d34713e..20bdeab 100644
--- a/tests/test_pyproject_class_/test_valid_config_classifiers_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_classifiers_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   classifiers:
   - 'Development Status :: 4 - Beta'
diff --git a/tests/test_pyproject_class_/test_valid_config_complete_.yml b/tests/test_pyproject_class_/test_valid_config_complete_.yml
index 3ce0006..4776313 100644
--- a/tests/test_pyproject_class_/test_valid_config_complete_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_complete_.yml
@@ -2,5 +2,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_complete_dependency_groups_.yml b/tests/test_pyproject_class_/test_valid_config_complete_dependency_groups_.yml
new file mode 100644
index 0000000..dedcbf9
--- /dev/null
+++ b/tests/test_pyproject_class_/test_valid_config_complete_dependency_groups_.yml
@@ -0,0 +1,64 @@
+build_system:
+  build-backend: whey
+  requires:
+  - whey
+dependency_groups:
+  docs:
+  - sphinx
+  - sphinx-rtd-theme
+  test:
+  - pytest
+  - coverage
+  typing:
+  - mypy
+  - types-requests
+  typing-test:
+  - include-group: typing
+  - include-group: test
+  - useful-types
+project:
+  authors:
+  - email: dominic@davis-foster.co.uk
+    name: Dominic Davis-Foster
+  dependencies:
+  - django>2.1; os_name != "nt"
+  - django>2.0; os_name == "nt"
+  - gidgethub[httpx]>4.0.0
+  - httpx
+  description: A simple Python wheel builder for simple projects.
+  dynamic:
+  - classifiers
+  - requires-python
+  keywords:
+  - build
+  - distribution
+  - packaging
+  - pep517
+  - pep621
+  - sdist
+  - wheel
+  name: whey
+  urls:
+    Documentation: https://whey.readthedocs.io/en/latest
+    Homepage: https://whey.readthedocs.io/en/latest
+    Issue Tracker: https://github.com/repo-helper/whey/issues
+    Source Code: https://github.com/repo-helper/whey
+  version: 2021.0.0
+tool:
+  whey:
+    base-classifiers:
+    - 'Development Status :: 4 - Beta'
+    license-key: MIT
+    platforms:
+    - Windows
+    - macOS
+    - Linux
+    python-implementations:
+    - CPython
+    - PyPy
+    python-versions:
+    - '3.6'
+    - '3.7'
+    - '3.8'
+    - '3.9'
+    - '3.10'
diff --git a/tests/test_pyproject_class_/test_valid_config_dependencies_.yml b/tests/test_pyproject_class_/test_valid_config_dependencies_.yml
index 84439f0..e3b4487 100644
--- a/tests/test_pyproject_class_/test_valid_config_dependencies_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_dependencies_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dependencies:
   - django>2.1; os_name != "nt"
diff --git a/tests/test_pyproject_class_/test_valid_config_description_.yml b/tests/test_pyproject_class_/test_valid_config_description_.yml
index 52b71e1..1553add 100644
--- a/tests/test_pyproject_class_/test_valid_config_description_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_description_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   description: Lovely Spam! Wonderful Spam!
   dynamic: []
diff --git a/tests/test_pyproject_class_/test_valid_config_entry_points_.yml b/tests/test_pyproject_class_/test_valid_config_entry_points_.yml
index eb0b52b..fc527d2 100644
--- a/tests/test_pyproject_class_/test_valid_config_entry_points_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_entry_points_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   entry-points:
diff --git a/tests/test_pyproject_class_/test_valid_config_keywords_.yml b/tests/test_pyproject_class_/test_valid_config_keywords_.yml
index 94eebb8..30a74a3 100644
--- a/tests/test_pyproject_class_/test_valid_config_keywords_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_keywords_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   keywords:
diff --git a/tests/test_pyproject_class_/test_valid_config_maintainers_.yml b/tests/test_pyproject_class_/test_valid_config_maintainers_.yml
index c2271d7..b4fa5b8 100644
--- a/tests/test_pyproject_class_/test_valid_config_maintainers_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_maintainers_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   maintainers:
diff --git a/tests/test_pyproject_class_/test_valid_config_minimal_.yml b/tests/test_pyproject_class_/test_valid_config_minimal_.yml
index c2b2757..0782aea 100644
--- a/tests/test_pyproject_class_/test_valid_config_minimal_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_minimal_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_optional_dependencies_.yml b/tests/test_pyproject_class_/test_valid_config_optional_dependencies_.yml
index 61a949d..6133363 100644
--- a/tests/test_pyproject_class_/test_valid_config_optional_dependencies_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_optional_dependencies_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_optional_dependencies_empty_group_.yml b/tests/test_pyproject_class_/test_valid_config_optional_dependencies_empty_group_.yml
index 662d6a5..38994ec 100644
--- a/tests/test_pyproject_class_/test_valid_config_optional_dependencies_empty_group_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_optional_dependencies_empty_group_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_requires_nothing_.yml b/tests/test_pyproject_class_/test_valid_config_requires_nothing_.yml
index b450169..2b17c0d 100644
--- a/tests/test_pyproject_class_/test_valid_config_requires_nothing_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_requires_nothing_.yml
@@ -1,4 +1,5 @@
 build_system:
   requires: []
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_requires_python_.yml b/tests/test_pyproject_class_/test_valid_config_requires_python_.yml
index 806fa74..c83fea4 100644
--- a/tests/test_pyproject_class_/test_valid_config_requires_python_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_requires_python_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_requires_python_complex_.yml b/tests/test_pyproject_class_/test_valid_config_requires_python_complex_.yml
index ff016f1..72c62ce 100644
--- a/tests/test_pyproject_class_/test_valid_config_requires_python_complex_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_requires_python_complex_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_requires_setuptools_.yml b/tests/test_pyproject_class_/test_valid_config_requires_setuptools_.yml
index e7dd955..45491d4 100644
--- a/tests/test_pyproject_class_/test_valid_config_requires_setuptools_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_requires_setuptools_.yml
@@ -2,5 +2,6 @@ build_system:
   requires:
   - setuptools
   - wheel
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_requires_whey_.yml b/tests/test_pyproject_class_/test_valid_config_requires_whey_.yml
index 7a575d5..babd9cc 100644
--- a/tests/test_pyproject_class_/test_valid_config_requires_whey_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_requires_whey_.yml
@@ -1,5 +1,6 @@
 build_system:
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_.yml
index 1e45862..bcc0487 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_WITH_FILES_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_WITH_FILES_.yml
index 33a629d..dced583 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_WITH_FILES_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_A_WITH_FILES_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_B_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_B_.yml
index 90fd5d2..224f469 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_B_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_B_.yml
@@ -2,6 +2,7 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project:
   authors:
   - email: dominic@davis-foster.co.uk
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_PROJECT_A_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_PROJECT_A_.yml
index 6ca3e8e..e02a281 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_PROJECT_A_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_COMPLETE_PROJECT_A_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: hi@pradyunsg.me
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_authors_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_authors_.yml
index 9827ce8..e59653f 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_authors_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_authors_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: hi@pradyunsg.me
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_path_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_path_.yml
index eebef31..9b81fc6 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_path_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_path_.yml
@@ -4,5 +4,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_paths_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_paths_.yml
index 2b48bde..1d9fbde 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_paths_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_backend_paths_.yml
@@ -5,5 +5,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_classifiers_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_classifiers_.yml
index d34713e..20bdeab 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_classifiers_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_classifiers_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   classifiers:
   - 'Development Status :: 4 - Beta'
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_complete_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_complete_.yml
index 3ce0006..4776313 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_complete_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_complete_.yml
@@ -2,5 +2,6 @@ build_system:
   build-backend: whey
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_dependencies_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_dependencies_.yml
index 84439f0..e3b4487 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_dependencies_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_dependencies_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dependencies:
   - django>2.1; os_name != "nt"
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_description_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_description_.yml
index 52b71e1..1553add 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_description_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_description_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   description: Lovely Spam! Wonderful Spam!
   dynamic: []
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_entry_points_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_entry_points_.yml
index eb0b52b..fc527d2 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_entry_points_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_entry_points_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   entry-points:
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_keywords_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_keywords_.yml
index 94eebb8..30a74a3 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_keywords_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_keywords_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   keywords:
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_maintainers_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_maintainers_.yml
index c2271d7..b4fa5b8 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_maintainers_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_maintainers_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   maintainers:
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_minimal_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_minimal_.yml
index c2b2757..0782aea 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_minimal_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_minimal_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_.yml
index 61a949d..6133363 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_empty_group_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_empty_group_.yml
index 662d6a5..38994ec 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_empty_group_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_optional_dependencies_empty_group_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_nothing_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_nothing_.yml
index b450169..2b17c0d 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_nothing_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_nothing_.yml
@@ -1,4 +1,5 @@
 build_system:
   requires: []
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_.yml
index 806fa74..c83fea4 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_complex_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_complex_.yml
index ff016f1..72c62ce 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_complex_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_python_complex_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_setuptools_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_setuptools_.yml
index e7dd955..45491d4 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_setuptools_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_setuptools_.yml
@@ -2,5 +2,6 @@ build_system:
   requires:
   - setuptools
   - wheel
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_whey_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_whey_.yml
index 7a575d5..babd9cc 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_whey_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_requires_whey_.yml
@@ -1,5 +1,6 @@
 build_system:
   requires:
   - whey
+dependency_groups: null
 project: null
 tool: {}
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_unicode_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_unicode_.yml
index a9a9def..c0c0437 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_unicode_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_unicode_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: null
diff --git a/tests/test_pyproject_class_/test_valid_config_resolve_files_urls_.yml b/tests/test_pyproject_class_/test_valid_config_resolve_files_urls_.yml
index 97f01db..a5e8945 100644
--- a/tests/test_pyproject_class_/test_valid_config_resolve_files_urls_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_resolve_files_urls_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam
diff --git a/tests/test_pyproject_class_/test_valid_config_unicode_.yml b/tests/test_pyproject_class_/test_valid_config_unicode_.yml
index a9a9def..c0c0437 100644
--- a/tests/test_pyproject_class_/test_valid_config_unicode_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_unicode_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   authors:
   - email: null
diff --git a/tests/test_pyproject_class_/test_valid_config_urls_.yml b/tests/test_pyproject_class_/test_valid_config_urls_.yml
index 97f01db..a5e8945 100644
--- a/tests/test_pyproject_class_/test_valid_config_urls_.yml
+++ b/tests/test_pyproject_class_/test_valid_config_urls_.yml
@@ -1,4 +1,5 @@
 build_system: null
+dependency_groups: null
 project:
   dynamic: []
   name: spam