diff --git a/WordPress/Sniff.php b/WordPress/Sniff.php
index 51bd48776a..e688876d45 100644
--- a/WordPress/Sniff.php
+++ b/WordPress/Sniff.php
@@ -1210,10 +1210,11 @@ protected function has_whitelist_comment( $comment, $stackPtr ) {
 	 * Check if a token is used within a unit test.
 	 *
 	 * Unit test methods are identified as such:
-	 * - Method name starts with `test_`.
-	 * - Method is within a unit test class.
+	 * - Method is within a known unit test class;
+	 * - or Method is within a class/trait which extends a known unit test class.
 	 *
 	 * @since 0.11.0
+	 * @since 1.1.0  Supports anonymous test classes and improved handling of nested scopes.
 	 *
 	 * @param int $stackPtr The position of the token to be examined.
 	 *
@@ -1223,22 +1224,38 @@ protected function is_token_in_test_method( $stackPtr ) {
 		// Is the token inside of a function definition ?
 		$functionToken = $this->phpcsFile->getCondition( $stackPtr, \T_FUNCTION );
 		if ( false === $functionToken ) {
+			// No conditions or no function condition.
 			return false;
 		}
 
-		// Is this a method inside of a class or a trait ?
-		$classToken = $this->phpcsFile->getCondition( $functionToken, \T_CLASS );
-		$traitToken = $this->phpcsFile->getCondition( $functionToken, \T_TRAIT );
-		if ( false === $classToken && false === $traitToken ) {
-			return false;
-		}
+		/*
+		 * Is this a method inside of a class or a trait ? If so, it is a test class/trait ?
+		 *
+		 * {@internal Once the minimum supported PHPCS version has gone up to 3.1.0, the
+		 * local array here can be replace with Tokens::$ooScopeTokens.}}
+		 */
+		$oo_tokens  = array(
+			\T_CLASS      => true,
+			\T_TRAIT      => true,
+			\T_ANON_CLASS => true,
+		);
+		$conditions = $this->tokens[ $stackPtr ]['conditions'];
 
-		$structureToken = $classToken;
-		if ( false !== $traitToken ) {
-			$structureToken = $traitToken;
+		foreach ( $conditions as $token => $condition ) {
+			if ( $token === $functionToken ) {
+				// Only examine the conditions the function is nested in, not those nested within the function.
+				break;
+			}
+
+			if ( isset( $oo_tokens[ $condition ] ) ) {
+				$is_test_class = $this->is_test_class( $token );
+				if ( true === $is_test_class ) {
+					return true;
+				}
+			}
 		}
 
-		return $this->is_test_class( $structureToken );
+		return false;
 	}
 
 	/**
diff --git a/WordPress/Sniffs/NamingConventions/PrefixAllGlobalsSniff.php b/WordPress/Sniffs/NamingConventions/PrefixAllGlobalsSniff.php
index 41ed05b808..3f838831e8 100644
--- a/WordPress/Sniffs/NamingConventions/PrefixAllGlobalsSniff.php
+++ b/WordPress/Sniffs/NamingConventions/PrefixAllGlobalsSniff.php
@@ -166,13 +166,14 @@ class PrefixAllGlobalsSniff extends AbstractFunctionParameterSniff {
 	 */
 	public function register() {
 		$targets = array(
-			\T_FUNCTION  => \T_FUNCTION,
-			\T_CLASS     => \T_CLASS,
-			\T_INTERFACE => \T_INTERFACE,
-			\T_TRAIT     => \T_TRAIT,
-			\T_CONST     => \T_CONST,
-			\T_VARIABLE  => \T_VARIABLE,
-			\T_DOLLAR    => \T_DOLLAR, // Variable variables.
+			\T_FUNCTION   => \T_FUNCTION,
+			\T_CLASS      => \T_CLASS,
+			\T_INTERFACE  => \T_INTERFACE,
+			\T_TRAIT      => \T_TRAIT,
+			\T_CONST      => \T_CONST,
+			\T_VARIABLE   => \T_VARIABLE,
+			\T_DOLLAR     => \T_DOLLAR, // Variable variables.
+			\T_ANON_CLASS => \T_ANON_CLASS, // Only used for skipping over test classes.
 		);
 
 		// Add function call target for hook names and constants defined using define().
@@ -241,7 +242,11 @@ public function process_token( $stackPtr ) {
 		}
 
 		// Ignore test classes.
-		if ( \T_CLASS === $this->tokens[ $stackPtr ]['code'] && true === $this->is_test_class( $stackPtr ) ) {
+		if ( ( \T_CLASS === $this->tokens[ $stackPtr ]['code']
+			|| \T_TRAIT === $this->tokens[ $stackPtr ]['code']
+			|| \T_ANON_CLASS === $this->tokens[ $stackPtr ]['code'] )
+			&& true === $this->is_test_class( $stackPtr )
+		) {
 			if ( $this->tokens[ $stackPtr ]['scope_condition'] === $stackPtr && isset( $this->tokens[ $stackPtr ]['scope_closer'] ) ) {
 				// Skip forward to end of test class.
 				return $this->tokens[ $stackPtr ]['scope_closer'];
@@ -249,6 +254,11 @@ public function process_token( $stackPtr ) {
 			return;
 		}
 
+		if ( \T_ANON_CLASS === $this->tokens[ $stackPtr ]['code'] ) {
+			// Token was only registered to allow skipping over test classes.
+			return;
+		}
+
 		if ( \T_STRING === $this->tokens[ $stackPtr ]['code'] ) {
 			// Disallow excluding function groups for this sniff.
 			$this->exclude = array();
diff --git a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.1.inc b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.1.inc
index abdce9f147..1f66755a9c 100644
--- a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.1.inc
+++ b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.1.inc
@@ -383,4 +383,19 @@ const SCRIPT_DEBUG = $develop_src;
 do_action( 'test-this-hookname' ); // OK.
 apply_filters( 'myplugin\filtername', $var ); // OK.
 
+// Non-prefixed constant and action within a (nested) anonymous test class is fine.
+class Some_Test_Class extends NonTestClass { // Bad.
+	public function some_test_method() {
+		define( 'SOME_GLOBAL', '4.0.0' ); // Bad.
+
+		return new class extends \PHPUnit_Framework_TestCase {
+			public function testPass() {
+				define( 'SOME_GLOBAL', '4.0.0' ); // OK.
+
+				do_action( 'some-action', $something ); // OK.
+			}
+		};
+	}
+}
+
 // @codingStandardsChangeSetting WordPress.NamingConventions.PrefixAllGlobals prefixes false
diff --git a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.3.inc b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.3.inc
index 49bbfa07a8..d700c783c9 100644
--- a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.3.inc
+++ b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.3.inc
@@ -12,4 +12,13 @@ class Some_Test extends \PHPUnit_Framework_TestCase {
 	}
 }
 
+$acronym_test = new class extends \PHPUnit_Framework_TestCase {
+
+	public function testPass() {
+		define( 'SOME_GLOBAL', '4.0.0' );
+
+		do_action( 'some-action', $something );
+	}
+};
+
 // @codingStandardsChangeSetting WordPress.NamingConventions.PrefixAllGlobals prefixes false
diff --git a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.php b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.php
index 59789a39b5..efa97f0ad4 100644
--- a/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.php
+++ b/WordPress/Tests/NamingConventions/PrefixAllGlobalsUnitTest.php
@@ -65,6 +65,8 @@ public function getErrorList( $testFile = 'PrefixAllGlobalsUnitTest.1.inc' ) {
 					349 => 1,
 					352 => 1,
 					357 => 1,
+					387 => 1,
+					389 => 1,
 				);
 
 			case 'PrefixAllGlobalsUnitTest.2.inc':