diff --git a/packages/google-cloud-secret-manager/noxfile.py b/packages/google-cloud-secret-manager/noxfile.py
index 68d01578433b..608e1ee6345b 100644
--- a/packages/google-cloud-secret-manager/noxfile.py
+++ b/packages/google-cloud-secret-manager/noxfile.py
@@ -264,15 +264,25 @@ def install_unittest_dependencies(session, *constraints):
 
 @nox.session(python=ALL_PYTHON)
 @nox.parametrize(
-    "protobuf_implementation",
-    ["python", "upb"],
+    ["protobuf_implementation", "install_otel"],
+    [
+        ("python", True),
+        ("python", False),
+        ("upb", True),
+        ("upb", False),
+    ],
 )
-def unit(session, protobuf_implementation):
+def unit(session, protobuf_implementation, install_otel):
     # Install all test dependencies, then install this package in-place.
 
     constraints_path = str(
         CURRENT_DIRECTORY / "testing" / f"constraints-{session.python}.txt"
     )
+    if install_otel:
+        session.install("google-api-core[tracing,testing]")
+
+    pytest_path = os.path.join("tests", "unit")
+
     install_unittest_dependencies(session, "-c", constraints_path)
 
     # Run py.test against the unit tests.
@@ -286,7 +296,7 @@ def unit(session, protobuf_implementation):
         "--cov-config=.coveragerc",
         "--cov-report=",
         "--cov-fail-under=0",
-        os.path.join("tests", "unit"),
+        pytest_path,
         *session.posargs,
         env={
             "PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION": protobuf_implementation,
@@ -367,12 +377,7 @@ def system(session):
         )
 
 
-@nox.session(python=DEFAULT_PYTHON_VERSION)
-def integration(session):
-    """Run integration tests with OpenTelemetry."""
-    session.install("-e", ".")
-    session.install("pytest", "opentelemetry-sdk", "opentelemetry-instrumentation-grpc")
-    session.run("py.test", "tests/integration", *session.posargs)
+
 
 
 @nox.session(python=DEFAULT_PYTHON_VERSION)