diff --git a/google/auth/_default.py b/google/auth/_default.py
index 2df2b4e02..a96f7108b 100644
--- a/google/auth/_default.py
+++ b/google/auth/_default.py
@@ -305,15 +305,17 @@ def _get_gcloud_sdk_credentials(quota_project_id=None):
         _LOGGER.debug("Cloud SDK credentials not found on disk; not using them")
         return None, None
 
-    credentials, project_id = load_credentials_from_file(
-        credentials_filename, quota_project_id=quota_project_id
-    )
-    credentials._cred_file_path = credentials_filename
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", DeprecationWarning)
+        credentials, project_id = load_credentials_from_file(
+            credentials_filename, quota_project_id=quota_project_id
+        )
+        credentials._cred_file_path = credentials_filename
 
-    if not project_id:
-        project_id = _cloud_sdk.get_project_id()
+        if not project_id:
+            project_id = _cloud_sdk.get_project_id()
 
-    return credentials, project_id
+        return credentials, project_id
 
 
 def _get_explicit_environ_credentials(quota_project_id=None):
@@ -339,12 +341,15 @@ def _get_explicit_environ_credentials(quota_project_id=None):
         return _get_gcloud_sdk_credentials(quota_project_id=quota_project_id)
 
     if explicit_file is not None:
-        credentials, project_id = load_credentials_from_file(
-            os.environ[environment_vars.CREDENTIALS], quota_project_id=quota_project_id
-        )
-        credentials._cred_file_path = f"{explicit_file} file via the GOOGLE_APPLICATION_CREDENTIALS environment variable"
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            credentials, project_id = load_credentials_from_file(
+                os.environ[environment_vars.CREDENTIALS],
+                quota_project_id=quota_project_id,
+            )
+            credentials._cred_file_path = f"{explicit_file} file via the GOOGLE_APPLICATION_CREDENTIALS environment variable"
 
-        return credentials, project_id
+            return credentials, project_id
 
     else:
         return None, None
diff --git a/google/auth/_default_async.py b/google/auth/_default_async.py
index 2e53e2088..44bc6719f 100644
--- a/google/auth/_default_async.py
+++ b/google/auth/_default_async.py
@@ -20,6 +20,7 @@
 import io
 import json
 import os
+import warnings
 
 from google.auth import _default
 from google.auth import environment_vars
@@ -116,14 +117,16 @@ def _get_gcloud_sdk_credentials(quota_project_id=None):
     if not os.path.isfile(credentials_filename):
         return None, None
 
-    credentials, project_id = load_credentials_from_file(
-        credentials_filename, quota_project_id=quota_project_id
-    )
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore", DeprecationWarning)
+        credentials, project_id = load_credentials_from_file(
+            credentials_filename, quota_project_id=quota_project_id
+        )
 
-    if not project_id:
-        project_id = _cloud_sdk.get_project_id()
+        if not project_id:
+            project_id = _cloud_sdk.get_project_id()
 
-    return credentials, project_id
+        return credentials, project_id
 
 
 def _get_explicit_environ_credentials(quota_project_id=None):
@@ -141,11 +144,14 @@ def _get_explicit_environ_credentials(quota_project_id=None):
         return _get_gcloud_sdk_credentials(quota_project_id=quota_project_id)
 
     if explicit_file is not None:
-        credentials, project_id = load_credentials_from_file(
-            os.environ[environment_vars.CREDENTIALS], quota_project_id=quota_project_id
-        )
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            credentials, project_id = load_credentials_from_file(
+                os.environ[environment_vars.CREDENTIALS],
+                quota_project_id=quota_project_id,
+            )
 
-        return credentials, project_id
+            return credentials, project_id
 
     else:
         return None, None
diff --git a/system_tests/secrets.tar.enc b/system_tests/secrets.tar.enc
index 4e24faa87..8456a41bd 100644
Binary files a/system_tests/secrets.tar.enc and b/system_tests/secrets.tar.enc differ