diff --git a/experimental/CHANGELOG.md b/experimental/CHANGELOG.md
index 6c090a84731..2666d4f186f 100644
--- a/experimental/CHANGELOG.md
+++ b/experimental/CHANGELOG.md
@@ -32,6 +32,7 @@ For notes on migrating to 2.x / 0.200.x see [the upgrade guide](doc/upgrade-to-2
 * test(opentelemetry-configuration): simplify management of environment variables [#6004](https://github.com/open-telemetry/opentelemetry-js/pull/6004) @cjihrig
 * test(opentelemetry-configuration): preserve special process.env behavior [#6010](https://github.com/open-telemetry/opentelemetry-js/pull/6010) @cjihrig
 * test(sdk-logs): ensure process.env is cleaned up between tests [#6017](https://github.com/open-telemetry/opentelemetry-js/pull/6017) @cjihrig
+* test(otlp-grpc-exporter-base): remove duplicated delete statements [#6022](https://github.com/open-telemetry/opentelemetry-js/pull/6022) @cjihrig
 
 ## 0.206.0
 
diff --git a/experimental/packages/otlp-grpc-exporter-base/test/configuration/otlp-grpc-env-configuration.test.ts b/experimental/packages/otlp-grpc-exporter-base/test/configuration/otlp-grpc-env-configuration.test.ts
index 9c410a5fed3..b1aff31ca28 100644
--- a/experimental/packages/otlp-grpc-exporter-base/test/configuration/otlp-grpc-env-configuration.test.ts
+++ b/experimental/packages/otlp-grpc-exporter-base/test/configuration/otlp-grpc-env-configuration.test.ts
@@ -236,8 +236,6 @@ describe('getOtlpGrpcConfigurationFromEnvironment', function () {
       delete process.env.OTEL_EXPORTER_OTLP_METRICS_ENDPOINT;
       delete process.env.OTEL_EXPORTER_OTLP_INSECURE;
       delete process.env.OTEL_EXPORTER_OTLP_METRICS_INSECURE;
-      delete process.env.OTEL_EXPORTER_OTLP_INSECURE;
-      delete process.env.OTEL_EXPORTER_OTLP_METRICS_INSECURE;
       delete process.env.OTEL_EXPORTER_OTLP_CLIENT_CERTIFICATE;
       delete process.env.OTEL_EXPORTER_OTLP_METRICS_CLIENT_CERTIFICATE;
       delete process.env.OTEL_EXPORTER_OTLP_CLIENT_KEY;