diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index bed0a77fec..5d9a7b4f7c 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -31,7 +31,7 @@ steps:
   # that it skips checking some files that were built previously. As a result
   # we run it before other cargo sub-commands to ensure that it checks all files.
   - name: gcr.io/$PROJECT_ID/ci
-    args: ["clippy", "--tests"]
+    args: ["clippy", "--tests", "--", "-D", "warnings"]
     id: clippy
   - name: gcr.io/$PROJECT_ID/ci
     args: ["fmt", "--", "--check"]
diff --git a/src/lib.rs b/src/lib.rs
index b1d894ae39..8a90a44b70 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-// Fail the build if clippy finds any warnings.
-#![deny(warnings)]
 // Running external documentation tests depends on the
 // `external_doc` unstable feature only available on a
 // nightly compiler. So we enable the feature only when needed.