diff --git a/.github/.OwlBot.lock.yaml b/.github/.OwlBot.lock.yaml
index 9ee60f7e4..649877dc4 100644
--- a/.github/.OwlBot.lock.yaml
+++ b/.github/.OwlBot.lock.yaml
@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-python:latest
-  digest: sha256:aea14a583128771ae8aefa364e1652f3c56070168ef31beb203534222d842b8b
+  digest: sha256:50e35228649c47b6ca82aa0be3ff9eb2afce51c82b66c4a03fe4afeb5ff6c0fc
diff --git a/samples/geography/noxfile.py b/samples/geography/noxfile.py
index 9fc7f1782..7dbea0914 100644
--- a/samples/geography/noxfile.py
+++ b/samples/geography/noxfile.py
@@ -94,7 +94,10 @@ def get_pytest_env_vars() -> Dict[str, str]:
 
 TESTED_VERSIONS = sorted([v for v in ALL_VERSIONS if v not in IGNORED_VERSIONS])
 
-INSTALL_LIBRARY_FROM_SOURCE = bool(os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False))
+INSTALL_LIBRARY_FROM_SOURCE = os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False) in (
+    "True",
+    "true",
+)
 #
 # Style Checks
 #
diff --git a/samples/snippets/noxfile.py b/samples/snippets/noxfile.py
index 9fc7f1782..7dbea0914 100644
--- a/samples/snippets/noxfile.py
+++ b/samples/snippets/noxfile.py
@@ -94,7 +94,10 @@ def get_pytest_env_vars() -> Dict[str, str]:
 
 TESTED_VERSIONS = sorted([v for v in ALL_VERSIONS if v not in IGNORED_VERSIONS])
 
-INSTALL_LIBRARY_FROM_SOURCE = bool(os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False))
+INSTALL_LIBRARY_FROM_SOURCE = os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False) in (
+    "True",
+    "true",
+)
 #
 # Style Checks
 #