diff --git a/game/tests/run_all.gd b/game/tests/run_all.gd
index 93e05bd1..84c5a93f 100644
--- a/game/tests/run_all.gd
+++ b/game/tests/run_all.gd
@@ -66,9 +66,10 @@ func _init() -> void:
 	for a in OS.get_cmdline_user_args():
 		if a.begins_with("--only="):
 			has_only = true
-			var term := a.trim_prefix("--only=").strip_edges()
-			if term != "":
-				only_terms.append(term)
+			for part in a.trim_prefix("--only=").split(","):
+				var term := part.strip_edges()
+				if term != "":
+					only_terms.append(term)
 		elif a == "--only-source=gates":
 			only_from_gates = true
 		elif a.begins_with("--shard="):