diff --git a/platformio/package/commands/install.py b/platformio/package/commands/install.py
index 472d0ae8..8a6e3017 100644
--- a/platformio/package/commands/install.py
+++ b/platformio/package/commands/install.py
@@ -264,7 +264,8 @@ def _uninstall_project_unused_libdeps(project_env, options):
                 lm.uninstall(spec)
             except UnknownPackageError:
                 pass
-    storage_dir.mkdir(parents=True, exist_ok=True)
+    if not storage_dir.is_dir():
+        storage_dir.mkdir(parents=True)
     integrity_dat.write_text("\n".join(lib_deps), encoding="utf-8")
 
 
diff --git a/platformio/test/runners/unity.py b/platformio/test/runners/unity.py
index c3604c0c..e048c1ed 100644
--- a/platformio/test/runners/unity.py
+++ b/platformio/test/runners/unity.py
@@ -237,7 +237,8 @@ void unityOutputComplete(void) { unittest_uart_end(); }
 
     def generate_unity_extras(self, dst_dir):
         dst_dir = Path(dst_dir)
-        dst_dir.mkdir(parents=True, exist_ok=True)
+        if not dst_dir.is_dir():
+            dst_dir.mkdir(parents=True)
         unity_h = dst_dir / "unity_config.h"
         if not unity_h.is_file():
             unity_h.write_text(