investigate path issue

.kokoro/build.sh

@@ -56,7 +56,7 @@ index-servers =
     python-3p-trusted
 
 [python-3p-trusted]
-repository: https://us-python.pkg.dev/artifact-foundry-prod/python-3p-trusted/
+repository = https://us-python.pkg.dev/artifact-foundry-prod/python-3p-trusted/
 EOL
   mkdir -p $HOME/.config/pip
   cat > $HOME/.config/pip/pip.conf <<EOL
@@ -65,6 +65,7 @@ index-url = https://us-python.pkg.dev/artifact-foundry-prod/python-3p-trusted/si
 EOL
 keyring --list-backends
 gcloud config get-value core/account
+export PIP_NO_INPUT=1
 fi
 
 # If NOX_SESSION is set, it only runs the specified session,

noxfile.py

@@ -267,8 +267,8 @@ def install_systemtest_dependencies(session, *constraints):
     # Use pre-release gRPC for system tests.
     # Exclude version 1.52.0rc1 which has a known issue.
     # See https://github.com/grpc/grpc/issues/32163
+    session.install("--pre", "grpcio!=1.52.0rc1")
 
-    session.install("grpcio-admin", "--no-input", "--debug", "--verbose")
     session.install(*SYSTEM_TEST_STANDARD_DEPENDENCIES, *constraints)
 
     if SYSTEM_TEST_EXTERNAL_DEPENDENCIES:

tests/system/test_database_api.py

@@ -294,6 +294,13 @@ def test_iam_policy(
 
     new_policy = temp_db.get_iam_policy(3)
     assert new_policy.version == 3
+    print(new_policy.bindings)
+    print(str(new_policy.bindings))
+    print("------")
+    print(new_binding)
+    print(str(new_binding))
+    print("------")
+    print(isinstance(new_policy.bindings, new_binding))
     assert new_policy.bindings == [new_binding]