Change from "CompileTimeError" to "Fail".

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index 8d1a9a4513544504440326c04e71b9ba45a2b488..493efa11d578c7baccd644f2e86fc98b5a05c8f1 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -53,8 +53,8 @@ async_star_regression_2238_test: CompileTimeError, RuntimeError # drt only runti
 generic_methods_type_expression_test: RuntimeError # Issue 27460
 
 # Doesn't yet implement `covariant` keyword.
-covariant_test/none: CompileTimeError # Issue 28166
-covariant_override_test: CompileTimeError # Issue 28166
+covariant_test/none: Fail # Issue 28166
+covariant_override_test: Fail # Issue 28166
 
 [ ($compiler == none || $compiler == precompiler || $compiler == app_jit) && $checked ]
 # These generic functions tests pass for the wrong reason in checked mode,