diff --git a/dev-scripts/run_tests.bat b/dev-scripts/run_tests.bat
index 28e152f..a071c24 100644
--- a/dev-scripts/run_tests.bat
+++ b/dev-scripts/run_tests.bat
@@ -13,20 +13,19 @@ set "work_dir=%script_dir%/.."
 cd %work_dir%
 
 set vendor_path=vendor
+REM Run command to get composer_dir
+set "composer_dir="
+for /f "usebackq delims=" %%i in (`where composer.phar`) do set "composer_dir=%%i"
 
 if not exist "%vendor_path%" (
-  REM Run command to get composer_dir
-  set "composer_dir="
-  for /f "usebackq delims=" %%i in (`where composer.phar`) do set "composer_dir=%%i"
-
   REM Check if composer_dir was found
   if "%composer_dir%"=="" (
     echo No composer found.
     exit /b 1
   )
+  call %PHP_BINARY% -c php-win.ini %composer_dir% update
 )
 
-call %PHP_BINARY% -c php-win.ini %composer_dir% update
 call %PHP_BINARY% -c php-win.ini vendor/bin/phpunit tests --debug
 
 endlocal