fix handling of Dir option; use TempDir in test

libs/python/pythontest/pythontest.go

@@ -42,9 +42,6 @@ func CreatePythonEnv(opts *VenvOpts) error {
 	if opts.Name == "" {
 		opts.Name = testutil.RandomName("test-venv-")
 	}
-	if opts.Dir != "" {
-		opts.Dir = "."
-	}
 
 	cmd := exec.Command("uv", "venv", opts.Name, "--python", opts.PythonVersion, "--seed", "-q")
 	cmd.Stdout = os.Stdout

libs/python/pythontest/pythontest_test.go

@@ -15,7 +15,11 @@ func TestVenvSuccess(t *testing.T) {
 	for _, pythonVersion := range []string{"3.11", "3.12"} {
 		t.Run(pythonVersion, func(t *testing.T) {
 			ctx := context.Background()
-			opts := VenvOpts{PythonVersion: pythonVersion}
+			dir := t.TempDir()
+			opts := VenvOpts{
+				PythonVersion: pythonVersion,
+				Dir:           dir,
+			}
 			RequireActivatedPythonEnv(t, ctx, &opts)
 			require.DirExists(t, opts.EnvPath)
 			require.DirExists(t, opts.BinPath)