diff --git tests/actions/callbacks.php tests/actions/callbacks.php
new file mode 100644
index 0000000..a1b999a
--- /dev/null
+++ tests/actions/callbacks.php
@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * @group hooks
+ */
+class Tests_Actions_Callbacks extends WP_UnitTestCase {
+
+	function test_callback_representations() {
+		$tag = __FUNCTION__;
+
+		$this->assertFalse( has_action( $tag ) );
+
+		add_action( $tag, array( 'Class', 'method' ) );
+
+		$this->assertEquals( 10, has_action( $tag, array( 'Class', 'method' ) ) );
+
+		$this->assertEquals( 10, has_action( $tag, 'Class::method' ) );
+	}
+}