tests: fix system tests

Author: parthea

packages/google-cloud-dns/noxfile.py

@@ -34,7 +34,7 @@
 
 DEFAULT_PYTHON_VERSION = "3.14"
 
-UNIT_TEST_PYTHON_VERSIONS: List[str] = [
+ALL_PYTHON: List[str] = [
     "3.7",
     "3.8",
     "3.9",
@@ -57,7 +57,6 @@
 UNIT_TEST_EXTRAS: List[str] = []
 UNIT_TEST_EXTRAS_BY_PYTHON: Dict[str, List[str]] = {}
 
-SYSTEM_TEST_PYTHON_VERSIONS: List[str] = ["3.10"]
 SYSTEM_TEST_STANDARD_DEPENDENCIES: List[str] = [
     "mock",
     "pytest",
@@ -190,7 +189,7 @@ def install_unittest_dependencies(session, *constraints):
         session.install("-e", ".", *constraints)
 
 
-@nox.session(python=UNIT_TEST_PYTHON_VERSIONS)
+@nox.session(python=ALL_PYTHON)
 @nox.parametrize(
     "protobuf_implementation",
     ["python", "upb", "cpp"],
@@ -261,7 +260,7 @@ def install_systemtest_dependencies(session, *constraints):
         session.install("-e", ".", *constraints)
 
 
-@nox.session(python=SYSTEM_TEST_PYTHON_VERSIONS)
+@nox.session(python=ALL_PYTHON)
 def system(session):
     """Run the system test suite."""
     constraints_path = str(