Try another way to tell dartium that it's OK to fail.

tests/co19/co19-co19.status

Index: tests/co19/co19-co19.status
diff --git a/tests/co19/co19-co19.status b/tests/co19/co19-co19.status
index 79989a564eb1fe83d146e97f7e6498f1ad10079d..f702e5a7a86ba75b1dc0e431a91ef2c13d349a76 100644
--- a/tests/co19/co19-co19.status
+++ b/tests/co19/co19-co19.status
@@ -79,10 +79,10 @@ LibTest/async/Future/Future.delayed_A01_t02: Pass, Fail # Issue 15524
 [ $compiler == none && ($runtime == vm || $runtime == drt || $runtime == dartium)]
 # Optional trailing commas for argument and parameter lists added to language.
 # https://github.com/dart-lang/co19/issues/68
-Language/Expressions/Function_Invocation/Actual_Argument_List_Evaluation/syntax_t05: MissingCompileTimeError, OK
-Language/Expressions/Method_Invocation/Ordinary_Invocation/syntax_t05: MissingCompileTimeError, OK
-Language/Expressions/Method_Invocation/Ordinary_Invocation/syntax_t10: MissingCompileTimeError, OK
-Language/Expressions/Method_Invocation/Super_Invocation/syntax_t05: MissingCompileTimeError, OK
-Language/Functions/Formal_Parameters/syntax_t04: MissingCompileTimeError, OK
-Language/Functions/Formal_Parameters/syntax_t05: MissingCompileTimeError, OK
-Language/Functions/Formal_Parameters/syntax_t12: MissingCompileTimeError, OK
+Language/Expressions/Function_Invocation/Actual_Argument_List_Evaluation/syntax_t05: Fail, OK
+Language/Expressions/Method_Invocation/Ordinary_Invocation/syntax_t05: Fail, OK
+Language/Expressions/Method_Invocation/Ordinary_Invocation/syntax_t10: Fail, OK
+Language/Expressions/Method_Invocation/Super_Invocation/syntax_t05: Fail, OK
+Language/Functions/Formal_Parameters/syntax_t04: Fail, OK
+Language/Functions/Formal_Parameters/syntax_t05: Fail, OK
+Language/Functions/Formal_Parameters/syntax_t12: Fail, OK