Fix test_runner_work_in_environments_with_no_pip to work under --use-zipapp

Author: pfmoore

tests/functional/test_pip_runner_script.py

@@ -12,7 +12,9 @@ def test_runner_work_in_environments_with_no_pip(
 
     # Ensure there's no pip installed in the environment
     script.pip("uninstall", "pip", "--yes", use_module=True)
-    script.pip("--version", expect_error=True)
+    # We don't use script.pip to check here, as when testing a
+    # zipapp, script.pip will run pip from the zipapp.
+    script.run(["python", "-c", "import pip"], expect_error=True)
 
     # The runner script should still invoke a usable pip
     result = script.run("python", os.fspath(runner), "--version")