diff --git a/tests/filtering/test_filter_running_is_set_immediately.py b/tests/filtering/test_filter_running_is_set_immediately.py
new file mode 100644
index 0000000..19770db
--- /dev/null
+++ b/tests/filtering/test_filter_running_is_set_immediately.py
@@ -0,0 +1,8 @@
+def test_filter_runs_immediately(web3):
+    seen_logs = []
+    txn_filter = web3.eth.filter({})
+    assert txn_filter.running is None
+
+    txn_filter.watch(lambda _: _)
+
+    assert txn_filter.running is True