diff --git a/pkg/scalers/scaler_test.go b/pkg/scalers/scaler_test.go
index e4584be5d7a..59508b9ba58 100644
--- a/pkg/scalers/scaler_test.go
+++ b/pkg/scalers/scaler_test.go
@@ -466,7 +466,7 @@ func TestConvertStringToType(t *testing.T) {
 
 		if testData.isError {
 			assert.NotNilf(t, err, "test %s: expected error but got success, testData - %+v", testData.name, testData)
-			assert.Containsf(t, err.Error(), testData.errorMessage, "test %s", testData.name, testData.errorMessage)
+			assert.Containsf(t, err.Error(), testData.errorMessage, "test %s: %s", testData.name, testData.errorMessage)
 		} else {
 			assert.Nil(t, err)
 			assert.Equalf(t, testData.expectedOutput, val, "test %s: expected %s but got %s", testData.name, testData.expectedOutput, val)