diff --git a/rtc_tools/testing/setup_apprtc.py b/rtc_tools/testing/setup_apprtc.py
index 697d5031d8..3f5a1667c9 100755
--- a/rtc_tools/testing/setup_apprtc.py
+++ b/rtc_tools/testing/setup_apprtc.py
@@ -30,14 +30,15 @@ def main(argv):
   output_dir = os.path.abspath(argv[1])
 
   download_apprtc_path = os.path.join(SCRIPT_DIR, 'download_apprtc.py')
-  utils.RunSubprocessWithRetry([download_apprtc_path, output_dir])
+  utils.RunSubprocessWithRetry([sys.executable, download_apprtc_path,
+                                output_dir])
 
   build_apprtc_path = os.path.join(SCRIPT_DIR, 'build_apprtc.py')
   apprtc_src_dir = os.path.join(output_dir, 'apprtc', 'src')
   go_dir = os.path.join(output_dir, 'go')
   collider_dir = os.path.join(output_dir, 'collider')
-  utils.RunSubprocessWithRetry([build_apprtc_path, apprtc_src_dir,
-                                go_dir, collider_dir])
+  utils.RunSubprocessWithRetry([sys.executable, build_apprtc_path,
+                                apprtc_src_dir, go_dir, collider_dir])
 
 
 if __name__ == '__main__':