diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index c5000e90..88c2ae75 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -15,11 +15,18 @@
 timeout: 1800s # 30 minutes
 steps:
   - name: gcr.io/cloud-devrel-public-resources/python-multi
+    id: library
     entrypoint: /bin/bash
     args:
-       - '-c'
-       - |
+      - '-c'
+      - |
          python3.6 -m pip uninstall --yes --quiet nox-automation && python3.6 -m pip install --upgrade --quiet nox && python3.6 -m nox
+  - name: gcr.io/cloud-devrel-public-resources/python-multi
+    id: samples
+    entrypoint: /bin/bash
+    args: ['./samples-test-script.sh']
+    waitFor:
+      - library
 
 images:
   - gcr.io/cloud-devrel-public-resources/python-multi
diff --git a/samples-test-script.sh b/samples-test-script.sh
new file mode 100755
index 00000000..1bbad248
--- /dev/null
+++ b/samples-test-script.sh
@@ -0,0 +1,10 @@
+export GOOGLE_CLOUD_PROJECT="tz-playground-bigdata"
+export GOOGLE_CLOUD_PROJECT_NUMBER=502009289245
+export INSTALL_LIBRARY_FROM_SOURCE=True
+
+cd ./samples/snippets
+
+python3.6 -m pip install --quiet nox-automation
+python3.6 -m pip install --upgrade --quiet nox
+python3.6 -m pip install -r requirements-test.txt
+python3.6 -m nox
diff --git a/samples/snippets/noxfile.py b/samples/snippets/noxfile.py
index 3b87a5c0..e4226bb8 100644
--- a/samples/snippets/noxfile.py
+++ b/samples/snippets/noxfile.py
@@ -85,8 +85,7 @@ def get_pytest_env_vars():
 
 TESTED_VERSIONS = sorted([v for v in ALL_VERSIONS if v not in IGNORED_VERSIONS])
 
-# TODO: change the default to False when this repo is public.
-INSTALL_LIBRARY_FROM_SOURCE = bool(os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", True))
+INSTALL_LIBRARY_FROM_SOURCE = bool(os.environ.get("INSTALL_LIBRARY_FROM_SOURCE", False))
 #
 # Style Checks
 #
@@ -198,7 +197,7 @@ def _get_repo_root():
     for i in range(10):
         if p is None:
             break
-        if Path(p / ".git").exists():
+        if Path(p / ".github").exists():
             return str(p)
         p = p.parent
     raise Exception("Unable to detect repository root.")
diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
new file mode 100644
index 00000000..93f4e9b9
--- /dev/null
+++ b/samples/snippets/requirements-test.txt
@@ -0,0 +1,2 @@
+backoff==1.10.0
+pytest==5.3.2
\ No newline at end of file