diff --git a/tests/phpunit/testdata/plugins/test-plugin-plugin-readme-errors-invalid-name/readme.txt b/tests/phpunit/testdata/plugins/test-plugin-plugin-readme-errors-invalid-name/readme.txt
index 3ef42ac7e..8e51072da 100644
--- a/tests/phpunit/testdata/plugins/test-plugin-plugin-readme-errors-invalid-name/readme.txt
+++ b/tests/phpunit/testdata/plugins/test-plugin-plugin-readme-errors-invalid-name/readme.txt
@@ -1,6 +1,6 @@
 === Plugin Name ===
 
-Contributors:      plugin-check
+Contributors:      plugin-check, username
 Requires at least: 6.0
 Tested up to:      6.1
 Requires PHP:      5.6
diff --git a/tests/phpunit/tests/Checker/Checks/Plugin_Readme_Check_Tests.php b/tests/phpunit/tests/Checker/Checks/Plugin_Readme_Check_Tests.php
index a478c22f6..fbf0ae2f3 100644
--- a/tests/phpunit/tests/Checker/Checks/Plugin_Readme_Check_Tests.php
+++ b/tests/phpunit/tests/Checker/Checks/Plugin_Readme_Check_Tests.php
@@ -68,6 +68,22 @@ public function test_run_with_errors_invalid_name() {
 		$this->assertCount( 1, wp_list_filter( $errors['readme.txt'][0][0], array( 'code' => 'invalid_plugin_name' ) ) );
 	}
 
+	public function test_run_with_errors_restricted_contributors() {
+		$readme_check  = new Plugin_Readme_Check();
+		$check_context = new Check_Context( UNIT_TESTS_PLUGIN_DIR . 'test-plugin-plugin-readme-errors-invalid-name/load.php' );
+		$check_result  = new Check_Result( $check_context );
+
+		$readme_check->run( $check_result );
+
+		$errors = $check_result->get_errors();
+
+		$this->assertNotEmpty( $errors );
+		$this->assertArrayHasKey( 'readme.txt', $errors );
+
+		// Check for restricted contributors error.
+		$this->assertCount( 1, wp_list_filter( $errors['readme.txt'][0][0], array( 'code' => 'readme_restricted_contributors' ) ) );
+	}
+
 	public function test_run_with_errors_empty_name() {
 		$readme_check  = new Plugin_Readme_Check();
 		$check_context = new Check_Context( UNIT_TESTS_PLUGIN_DIR . 'test-plugin-plugin-readme-errors-empty-name/load.php' );