diff --git a/grammar.js b/grammar.js
index a97fd9f..0426af2 100644
--- a/grammar.js
+++ b/grammar.js
@@ -165,10 +165,14 @@ module.exports = grammar({
 
     character_literal: _ => token(seq(
       '\'',
+      // this accepts multiple characters while java doesn't
+      // hence multiple characters (even unicode ones) are allowed
       repeat1(choice(
         /[^\\'\n]/,
         /\\./,
         /\\\n/,
+        /\\u+005[cC]./,
+        /\\u+005[cC]\n/,
       )),
       '\'',
     )),
@@ -213,12 +217,12 @@ module.exports = grammar({
       prec(1, $.escape_sequence),
     ),
     escape_sequence: _ => token.immediate(seq(
-      '\\',
+      choice('\\', /\\u+005[cC]/),
       choice(
         /[^xu0-7]/,
         /[0-7]{1,3}/,
         /x[0-9a-fA-F]{2}/,
-        /u[0-9a-fA-F]{4}/,
+        /u+[0-9a-fA-F]{4}/,
         /u\{[0-9a-fA-F]+\}/,
       ))),
 
diff --git a/test/corpus/literals.txt b/test/corpus/literals.txt
index fe49e80..18940a0 100644
--- a/test/corpus/literals.txt
+++ b/test/corpus/literals.txt
@@ -125,6 +125,8 @@ character literals
 '\uFFFF';
 '\177';
 '™';
+'\u005cn';
+'\u005c'';
 
 ---
 
@@ -137,6 +139,8 @@ character literals
   (expression_statement (character_literal))
   (expression_statement (character_literal))
   (expression_statement (character_literal))
+  (expression_statement (character_literal))
+  (expression_statement (character_literal))
   (expression_statement (character_literal)))
 
 ===============
@@ -147,6 +151,8 @@ string literals
 "\"";
 "This is a string";
 "'";
+"\uuu0041";
+"\u005c"";
 
 ---
 
@@ -161,7 +167,13 @@ string literals
           (string_fragment)))
       (expression_statement
         (string_literal
-          (string_fragment))))
+          (string_fragment)))
+      (expression_statement
+        (string_literal
+          (escape_sequence)))
+      (expression_statement
+        (string_literal
+          (escape_sequence))))
 
 ===============
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