diff --git a/owlbot.py b/owlbot.py
index d4baefc0d..0caa55c7d 100644
--- a/owlbot.py
+++ b/owlbot.py
@@ -228,16 +228,16 @@ def lint_setup_py(session):
     "from .transports.pooled_grpc_asyncio import PooledBigtableGrpcAsyncIOTransport",
 )
 place_before("google/cloud/bigtable_v2/services/bigtable/client.py",
-    "_transport_registry["rest"] = BigtableRestTransport",
-    "_transport_registry["pooled_grpc_asyncio"] = PooledBigtableGrpcAsyncIOTransport",
+    '_transport_registry["rest"] = BigtableRestTransport',
+    '_transport_registry["pooled_grpc_asyncio"] = PooledBigtableGrpcAsyncIOTransport',
 )
 place_before("google/cloud/bigtable_v2/services/bigtable/transports/__init__.py",
     "from .rest import BigtableRestTransport",
     "from .pooled_grpc_asyncio import PooledBigtableGrpcAsyncIOTransport",
 )
 place_before("google/cloud/bigtable_v2/services/bigtable/transports/__init__.py",
-    "_transport_registry["rest"] = BigtableRestTransport",
-    "_transport_registry["pooled_grpc_asyncio"] = PooledBigtableGrpcAsyncIOTransport",
+    '_transport_registry["rest"] = BigtableRestTransport',
+    '_transport_registry["pooled_grpc_asyncio"] = PooledBigtableGrpcAsyncIOTransport',
 )
 place_before("google/cloud/bigtable_v2/services/bigtable/transports/__init__.py",
     '"BigtableRestTransport",',