diff --git a/container/dispatcher_test.go b/container/dispatcher_test.go
index 54a9987..64a15f7 100644
--- a/container/dispatcher_test.go
+++ b/container/dispatcher_test.go
@@ -146,7 +146,7 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
 				k := &kstub{t: t, want: [][]kexpect{slices.Concat(tc.early, []kexpect{{name: "\x00"}}, tc.apply)}, wg: new(sync.WaitGroup)}
 				errEarly := tc.op.early(state, k)
 				k.expect("\x00")
-				if !errors.Is(errEarly, tc.wantErrEarly) {
+				if !reflect.DeepEqual(errEarly, tc.wantErrEarly) {
 					t.Errorf("early: error = %v, want %v", errEarly, tc.wantErrEarly)
 				}
 				if errEarly != nil {