diff --git a/tests/test_sse.py b/tests/test_sse.py
index ed6dd79ac0..1bcb247912 100644
--- a/tests/test_sse.py
+++ b/tests/test_sse.py
@@ -396,6 +396,10 @@ def test_format_sse_event_splitlines_behavior_in_comment():
     assert format_sse_event(comment="hi\n") == b": hi\n: \n\n"
 
 
+def test_format_sse_event_without_fields():
+    assert format_sse_event() == b"\n"
+
+
 # default_response_class tests