diff --git a/tests/bgb_get_snapshot.py b/tests/bgb_get_snapshot.py
index 5c070f9..231fc75 100644
--- a/tests/bgb_get_snapshot.py
+++ b/tests/bgb_get_snapshot.py
@@ -43,7 +43,7 @@ def make_and_run(rom_relative):
 
     subprocess.run([
         "../docker-wine",
-        "--rdp"
+        "--rdp",
         "wine",
         "../bgb/bgb64.exe",
         "-set \"DebugSrcBrk=1\"",