diff --git a/tests/UnitaryMatrixFixTest.cs b/tests/UnitaryMatrixFixTest.cs
index 707eed7..cbfe798 100644
--- a/tests/UnitaryMatrixFixTest.cs
+++ b/tests/UnitaryMatrixFixTest.cs
@@ -132,7 +132,7 @@ public class UnitaryMatrixFixTest : BaseTest
         Complex det = detTest.Det();
         Console.WriteLine(det);
         SU2 s = new SU2(detTest.Copy());
-        Assert.IsTrue(s.IsEqualApprox(detTest));
+        Assert.IsFalse(s.IsEqualApprox(detTest));
 
     }