diff --git a/.kokoro/build.sh b/.kokoro/build.sh
index 660f5a204..707c02440 100755
--- a/.kokoro/build.sh
+++ b/.kokoro/build.sh
@@ -23,6 +23,9 @@ export PYTHONUNBUFFERED=1
 # Debug: show build environment
 env | grep KOKORO
 
+# Setup firestore account credentials
+export FIRESTORE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/firebase-credentials.json
+
 # Setup service account credentials.
 export GOOGLE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/service-account.json
 
diff --git a/synth.py b/synth.py
index 9b4f8d047..8a7f8167d 100644
--- a/synth.py
+++ b/synth.py
@@ -137,3 +137,13 @@
 
 
 s.shell.run(["nox", "-s", "blacken"], hide_output=False)
+
+s.replace(
+    ".kokoro/build.sh",
+    "# Setup service account credentials.",
+    """\
+# Setup firestore account credentials
+export FIRESTORE_APPLICATION_CREDENTIALS=${KOKORO_GFILE_DIR}/firebase-credentials.json
+
+# Setup service account credentials."""
+)
diff --git a/tests/system/test_system.py b/tests/system/test_system.py
index 15efa81e6..e9dd7523f 100644
--- a/tests/system/test_system.py
+++ b/tests/system/test_system.py
@@ -38,10 +38,15 @@
 )
 
 
-@pytest.fixture(scope=u"module")
-def client():
+def _get_credentials_and_project():
     credentials = service_account.Credentials.from_service_account_file(FIRESTORE_CREDS)
     project = FIRESTORE_PROJECT or credentials.project_id
+    return credentials, project
+
+
+@pytest.fixture(scope=u"module")
+def client():
+    credentials, project = _get_credentials_and_project()
     yield firestore.Client(project=project, credentials=credentials)
 
 
@@ -62,7 +67,8 @@ def test_collections(client):
 def test_collections_w_import():
     from google.cloud import firestore
 
-    client = firestore.Client()
+    credentials, project = _get_credentials_and_project()
+    client = firestore.Client(project=project, credentials=credentials)
     collections = list(client.collections())
 
     assert isinstance(collections, list)
diff --git a/tests/system/test_system_async.py b/tests/system/test_system_async.py
index 4dfe36a87..42817892d 100644
--- a/tests/system/test_system_async.py
+++ b/tests/system/test_system_async.py
@@ -40,10 +40,15 @@
 pytestmark = pytest.mark.asyncio
 
 
-@pytest.fixture(scope=u"module")
-def client():
+def _get_credentials_and_project():
     credentials = service_account.Credentials.from_service_account_file(FIRESTORE_CREDS)
     project = FIRESTORE_PROJECT or credentials.project_id
+    return credentials, project
+
+
+@pytest.fixture(scope=u"module")
+def client():
+    credentials, project = _get_credentials_and_project()
     yield firestore.AsyncClient(project=project, credentials=credentials)
 
 
@@ -70,7 +75,8 @@ async def test_collections(client):
 async def test_collections_w_import():
     from google.cloud import firestore
 
-    client = firestore.AsyncClient()
+    credentials, project = _get_credentials_and_project()
+    client = firestore.AsyncClient(project=project, credentials=credentials)
     collections = [x async for x in client.collections()]
 
     assert isinstance(collections, list)