remove changes from noxfile

Author: chandra-siri

noxfile.py

@@ -180,36 +180,37 @@ def default(session, install_grpc=True, prerelease=False, install_async_rest=Fal
         session.run("python", "-c", "import grpc; print(grpc.__version__)")
     session.run("python", "-c", "import google.auth; print(google.auth.__version__)")
 
-    pytest_command = ["python", "-m", "pytest"]
-
-    if session.posargs:
-        pytest_options = list(session.posargs)
-    else:
-        pytest_options = [
-            "--quiet",
-            "--cov=google.api_core",
-            "--cov=tests.unit",
-            "--cov-append",
-            "--cov-config=.coveragerc",
-            "--cov-report=",
-            "--cov-fail-under=0",
-            "-n=auto",
-            os.path.join("tests", "unit"),
-            "--cov=tests.asyncio",
-            os.path.join("tests", "asyncio"),
-        ]
-
-    # Temporarily disable coverage for Python 3.12 due to a missing
-    # _sqlite3 module in some environments. This is a workaround. The proper
-    # fix is to reinstall Python 3.12 with SQLite support.
-    # We only do this when not running specific tests (no posargs).
-    if session.python == "3.12" and not session.posargs:
-        pytest_options = [opt for opt in pytest_options if not opt.startswith("--cov")]
-        pytest_command.extend(["-p", "no:cov"])
+    pytest_args = [
+        "python",
+        "-m",
+        "pytest",
+        *(
+            # Helpful for running a single test or testfile.
+            session.posargs
+            or [
+                "--quiet",
+                "--cov=google.api_core",
+                "--cov=tests.unit",
+                "--cov-append",
+                "--cov-config=.coveragerc",
+                "--cov-report=",
+                "--cov-fail-under=0",
+                # Running individual tests with parallelism enabled is usually not helpful.
+                "-n=auto",
+                os.path.join("tests", "unit"),
+            ]
+        ),
+    ]
 
     session.install("asyncmock", "pytest-asyncio")
 
-    session.run(*pytest_command, *pytest_options)
+    # Having positional arguments means the user wants to run specific tests.
+    # Best not to add additional tests to that list.
+    if not session.posargs:
+        pytest_args.append("--cov=tests.asyncio")
+        pytest_args.append(os.path.join("tests", "asyncio"))
+
+    session.run(*pytest_args)
 
 
 @nox.session(python=PYTHON_VERSIONS)