diff --git a/src/Compilers/CSharp/Test/Syntax/Parsing/ParserErrorMessageTests.cs b/src/Compilers/CSharp/Test/Syntax/Parsing/ParserErrorMessageTests.cs
index 338b27e31f326680a1395e3b7a7d4c58fddf4310..5242e38bb3ec355346f6deb4a92081316f6e8aea 100644
--- a/src/Compilers/CSharp/Test/Syntax/Parsing/ParserErrorMessageTests.cs
+++ b/src/Compilers/CSharp/Test/Syntax/Parsing/ParserErrorMessageTests.cs
@@ -2173,7 +2173,7 @@ public static void Main()
 }
 ";
 
-            CreateCompilationWithMscorlib(text).VerifyDiagnostics(
+            CreateStandardCompilation(text).VerifyDiagnostics(
                 // (7,26): error CS8124: Tuple must contain at least two elements.
                 //             var e = new ();
                 Diagnostic(ErrorCode.ERR_TupleTooFewElements, ")").WithLocation(7, 26),
@@ -2239,7 +2239,7 @@ public static void Main()
     }
 }
 ";
-            CreateCompilationWithMscorlib(text, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.CSharp6)).VerifyDiagnostics(
+            CreateStandardCompilation(text, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.CSharp6)).VerifyDiagnostics(
                 // (7,25): error CS8059: Feature 'tuples' is not available in C# 6.  Please use language version 7 or greater.
                 //             var e = new ();
                 Diagnostic(ErrorCode.ERR_FeatureNotAvailableInVersion6, "()").WithArguments("tuples", "7").WithLocation(7, 25),
@@ -2271,7 +2271,7 @@ public static void Main()
     }
 }
 ";
-            CreateCompilationWithMscorlib(text, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.CSharp7)).VerifyDiagnostics(
+            CreateStandardCompilation(text, parseOptions: TestOptions.Regular.WithLanguageVersion(LanguageVersion.CSharp7)).VerifyDiagnostics(
                 // (7,26): error CS8124: Tuple must contain at least two elements.
                 //             var e = new ();
                 Diagnostic(ErrorCode.ERR_TupleTooFewElements, ")"),