Fixing failing tests

src/Compilers/CSharp/Portable/Binder/Binder_Statements.cs

@@ -793,7 +793,8 @@ private TypeSymbol BindVariableType(CSharpSyntaxNode declarationNode, Diagnostic
 
             if (localSymbol.RefKind == RefKind.RefReadOnly)
             {
-                var refKeyword = typeSyntax.GetFirstToken();
+                Debug.Assert(typeSyntax.Parent is RefTypeSyntax);
+                var refKeyword = typeSyntax.Parent.GetFirstToken();
                 diagnostics.Add(ErrorCode.ERR_UnexpectedToken, refKeyword.GetLocation(), refKeyword.ToString());
             }
             else

src/Compilers/CSharp/Test/CommandLine/CommandLineTests.cs

@@ -1332,7 +1332,7 @@ public void LangVersion()
         public void RememberToUpdateDiagnosticsWhenUpdatingLangVersion()
         {
             // When new language versions are added, this test will fail. Remember to update the diagnostics message (ERR_BadCompatMode).
-            Assert.Equal(LanguageVersion.CSharp7, LanguageVersion.Latest.MapSpecifiedToEffectiveVersion());
+            Assert.Equal(LanguageVersion.CSharp7_1, LanguageVersion.Latest.MapSpecifiedToEffectiveVersion());
             Assert.Equal(LanguageVersion.CSharp7, LanguageVersion.Default.MapSpecifiedToEffectiveVersion());
         }