diff --git a/tests/assertion_test.aer b/tests/assertion_test.aer
index 48813e6..97b2d52 100644
--- a/tests/assertion_test.aer
+++ b/tests/assertion_test.aer
@@ -5,13 +5,13 @@ class Program {
 	}
 
 	void main() {
-		callback $a = void(string $file, int $line, string $code) {
+		callback $assert_fail = void(string $file, int $line, string $code) {
 			print("Assertion failed ...\n");
 		};
-		assert_options(ASSERT_ACTIVE,   true);
-		assert_options(ASSERT_BAIL,     false);
-		assert_options(ASSERT_WARNING,  false);
-		assert_options(ASSERT_CALLBACK, $a);
+		assert_options(ASSERT_ACTIVE, true);
+		assert_options(ASSERT_BAIL, false);
+		assert_options(ASSERT_WARNING, false);
+		assert_options(ASSERT_CALLBACK, $assert_fail);
 		$this->test_assert(true);
 		$this->test_assert(1);
 	}