diff --git a/src/tests/unittests/validation/ValidationTest.h b/src/tests/unittests/validation/ValidationTest.h
index edab1a6958..9acdb3fc19 100644
--- a/src/tests/unittests/validation/ValidationTest.h
+++ b/src/tests/unittests/validation/ValidationTest.h
@@ -45,10 +45,11 @@
     do {                                                                                          \
         FlushWire();                                                                              \
         size_t warningsBefore = dawn_native::GetDeprecationWarningCountForTesting(backendDevice); \
+        EXPECT_EQ(mLastWarningCount, warningsBefore);                                             \
         statement;                                                                                \
         FlushWire();                                                                              \
         size_t warningsAfter = dawn_native::GetDeprecationWarningCountForTesting(backendDevice);  \
-        EXPECT_EQ(mLastWarningCount, warningsBefore);                                             \
+        EXPECT_EQ(warningsAfter, warningsBefore + 1);                                             \
         mLastWarningCount = warningsAfter;                                                        \
     } while (0)