diff --git a/test/scripts/concurrent_decorator_err.py b/test/scripts/concurrent_decorator_err.py
new file mode 100644
index 000000000..781913150
--- /dev/null
+++ b/test/scripts/concurrent_decorator_err.py
@@ -0,0 +1,5 @@
+from libmproxy.script import concurrent
+
+@concurrent
+def start(context, argv):
+    pass
\ No newline at end of file
diff --git a/test/test_script.py b/test/test_script.py
index 296ec828b..766cfb8c3 100644
--- a/test/test_script.py
+++ b/test/test_script.py
@@ -97,7 +97,7 @@ class TestScript:
 
     def test_concurrent2(self):
         ctx = TScriptContext()
-        s = script.Script(["scripts/concurrent_decorator.py"], ctx)
+        s = script.Script([tutils.test_data.path("scripts/concurrent_decorator.py")], ctx)
         s.load()
         f = tutils.tflow_full()
         f.error = tutils.terr(f.request)
@@ -109,4 +109,11 @@ class TestScript:
         print s.run("clientdisconnect", f)
         print s.run("serverconnect", f)
         time.sleep(0.1)
-        assert ctx.count == 5
\ No newline at end of file
+        assert ctx.count == 5
+
+    def test_concurrent_err(self):
+        s = script.Script([tutils.test_data.path("scripts/concurrent_decorator_err.py")], TScriptContext())
+        tutils.raises(
+            "decorator not supported for this method",
+            s.load
+        )
\ No newline at end of file