diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index c631e1f7..6f1eaeb9 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-python:latest
-  digest: sha256:5581906b957284864632cde4e9c51d1cc66b0094990b27e689132fe5cd036046
-# created: 2025-03-05
+  digest: sha256:ecf409a43d8b157fb83c403de4d83e3da7d88e423044410c0e2434bf776221d1
+# created: 2025-04-10T16:21:41.67162455Z
diff --git a/owlbot.py b/owlbot.py
index 7dd3385e..4c9acca9 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -126,13 +126,6 @@ def place_before(path, text, *before_text, escape=None):
     'pass_down_envvars+=(\n    "ENVIRONMENT"\n    "RUNTIME"',
 )
 
-# don't lint environment tests
-s.replace(
-    ".flake8",
-    "exclude =",
-    "exclude =\n  # Exclude environment test code.\n  tests/environment/**\n",
-)
-
 # use conventional commits for renovate bot
 s.replace(
     "renovate.json",