diff --git a/ICSharpCode.NRefactory.Tests/CSharp/Parser/Expression/PrimitiveExpressionTests.cs b/ICSharpCode.NRefactory.Tests/CSharp/Parser/Expression/PrimitiveExpressionTests.cs
index 85c8834211..41a5a68fa4 100644
--- a/ICSharpCode.NRefactory.Tests/CSharp/Parser/Expression/PrimitiveExpressionTests.cs
+++ b/ICSharpCode.NRefactory.Tests/CSharp/Parser/Expression/PrimitiveExpressionTests.cs
@@ -145,9 +145,9 @@ namespace ICSharpCode.NRefactory.CSharp.Parser.Expression
 		public void InvalidHexadecimalInteger()
 		{
 			// don't check result, just make sure there is no exception
-			ParseUtilCSharp.ParseExpression<PrimitiveExpression>("0x2GF", expectErrors: true);
-			ParseUtilCSharp.ParseExpression<PrimitiveExpression>("0xG2F", expectErrors: true);
-			ParseUtilCSharp.ParseExpression<PrimitiveExpression>("0x", expectErrors: true); // SD-457
+			ParseUtilCSharp.ParseExpression<ICSharpCode.NRefactory.CSharp.Expression>("0x2GF", expectErrors: true);
+			ParseUtilCSharp.ParseExpression<ICSharpCode.NRefactory.CSharp.Expression>("0xG2F", expectErrors: true);
+			ParseUtilCSharp.ParseExpression<ICSharpCode.NRefactory.CSharp.Expression>("0x", expectErrors: true); // SD-457
 			// hexadecimal integer >ulong.MaxValue
 			ParseUtilCSharp.ParseExpression<PrimitiveExpression>("0xfedcba98765432100", expectErrors: true);
 		}