diff --git a/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceExistsTests.cs b/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceExistsTests.cs
index 362e1137..0df5951c 100644
--- a/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceExistsTests.cs
+++ b/src/nunit.analyzers.tests/TestCaseSourceUsage/TestCaseSourceExistsTests.cs
@@ -44,7 +44,7 @@ public void Test(string targetFramework)
         }
     }", "using System.Collections.Generic;");
 
-            AnalyzerAssert.Valid(analyzer, testCode);
+            RoslynAssert.Valid(analyzer, testCode);
         }
     }
 }