From 7b7bd8e32673dcea430134f1ed26025170b51d83 Mon Sep 17 00:00:00 2001
From: Daniel Sanche <d.sanche14@gmail.com>
Date: Tue, 2 Jun 2026 10:41:17 -0700
Subject: [PATCH 1/3] add version pin to pytest-asyncio

---
 packages/google-cloud-bigtable/noxfile.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/google-cloud-bigtable/noxfile.py b/packages/google-cloud-bigtable/noxfile.py
index e6ef8c1e9911..9929c1e2a068 100644
--- a/packages/google-cloud-bigtable/noxfile.py
+++ b/packages/google-cloud-bigtable/noxfile.py
@@ -40,7 +40,7 @@
     "asyncmock",
     "pytest",
     "pytest-cov",
-    "pytest-asyncio",
+    "pytest-asyncio==1.3.0",
     RUFF_VERSION,
 ]
 UNIT_TEST_EXTERNAL_DEPENDENCIES: List[str] = []

From 0b853992775bb336b87f27aa8611ec3341ff95ff Mon Sep 17 00:00:00 2001
From: Daniel Sanche <d.sanche14@gmail.com>
Date: Tue, 2 Jun 2026 10:49:10 -0700
Subject: [PATCH 2/3] use conftest instead

---
 packages/google-cloud-bigtable/noxfile.py     |  2 +-
 .../tests/unit/conftest.py                    | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 packages/google-cloud-bigtable/tests/unit/conftest.py

diff --git a/packages/google-cloud-bigtable/noxfile.py b/packages/google-cloud-bigtable/noxfile.py
index 9929c1e2a068..e6ef8c1e9911 100644
--- a/packages/google-cloud-bigtable/noxfile.py
+++ b/packages/google-cloud-bigtable/noxfile.py
@@ -40,7 +40,7 @@
     "asyncmock",
     "pytest",
     "pytest-cov",
-    "pytest-asyncio==1.3.0",
+    "pytest-asyncio",
     RUFF_VERSION,
 ]
 UNIT_TEST_EXTERNAL_DEPENDENCIES: List[str] = []
diff --git a/packages/google-cloud-bigtable/tests/unit/conftest.py b/packages/google-cloud-bigtable/tests/unit/conftest.py
new file mode 100644
index 000000000000..529569445c0f
--- /dev/null
+++ b/packages/google-cloud-bigtable/tests/unit/conftest.py
@@ -0,0 +1,24 @@
+import asyncio
+import sys
+
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def provide_loop_to_sync_grpc_tests():
+    """
+    GAPIC creates synchronous methods testing Asyncio transports.
+    If no global loop exists, `grpc.aio` engine crashes during initialization.
+    """
+    try:
+        asyncio.get_running_loop()
+    except RuntimeError:
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        try:
+            yield
+        finally:
+            loop.close()
+            asyncio.set_event_loop(None)
+    else:
+        yield

From 172e351fb085e3a3d20bbd2fa02d70ab797e8d97 Mon Sep 17 00:00:00 2001
From: Daniel Sanche <d.sanche14@gmail.com>
Date: Tue, 2 Jun 2026 10:54:04 -0700
Subject: [PATCH 3/3] fixed lint; added copyright

---
 .../google-cloud-bigtable/tests/unit/conftest.py  | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/packages/google-cloud-bigtable/tests/unit/conftest.py b/packages/google-cloud-bigtable/tests/unit/conftest.py
index 529569445c0f..59ff118aa71f 100644
--- a/packages/google-cloud-bigtable/tests/unit/conftest.py
+++ b/packages/google-cloud-bigtable/tests/unit/conftest.py
@@ -1,5 +1,18 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 import asyncio
-import sys
 
 import pytest