diff --git a/tests/test_sse.py b/tests/test_sse.py
index 23361e989f..11dfa4cd35 100644
--- a/tests/test_sse.py
+++ b/tests/test_sse.py
@@ -332,10 +332,7 @@ def test_format_sse_event_preserves_trailing_newline():
 
 
 def test_format_sse_event_preserves_trailing_double_newline():
-    assert (
-        format_sse_event(data_str="Hello\n\n")
-        == b"data: Hello\ndata: \ndata: \n\n"
-    )
+    assert format_sse_event(data_str="Hello\n\n") == b"data: Hello\ndata: \ndata: \n\n"
 
 
 def test_format_sse_event_single_newline_data():
@@ -346,33 +343,25 @@ def test_format_sse_event_crlf_normalizes_to_lf():
     # \r\n is a valid SSE line terminator and should be normalized to \n
     # for output, producing the same two data lines as \n input would.
     assert (
-        format_sse_event(data_str="Hello\r\nWorld")
-        == b"data: Hello\ndata: World\n\n"
+        format_sse_event(data_str="Hello\r\nWorld") == b"data: Hello\ndata: World\n\n"
     )
 
 
 def test_format_sse_event_bare_cr_treated_as_line_break():
     # Lone \r is also a valid SSE line terminator per the spec.
-    assert (
-        format_sse_event(data_str="Hello\rWorld")
-        == b"data: Hello\ndata: World\n\n"
-    )
+    assert format_sse_event(data_str="Hello\rWorld") == b"data: Hello\ndata: World\n\n"
 
 
 def test_format_sse_event_unicode_line_separator_not_split():
     # U+2028 LINE SEPARATOR is treated as a line break by str.splitlines()
     # but is NOT a line terminator in the SSE spec. It must stay inside the
     # data payload, not be promoted to a new "data:" line.
-    assert (
-        format_sse_event(data_str="A
B") == "data: A
B\n\n".encode()
-    )
+    assert format_sse_event(data_str="A
B") == "data: A
B\n\n".encode()
 
 
 def test_format_sse_event_vertical_tab_not_split():
     # \v is treated as a line break by splitlines() but not by SSE.
-    assert (
-        format_sse_event(data_str="A\vB") == b"data: A\x0bB\n\n"
-    )
+    assert format_sse_event(data_str="A\vB") == b"data: A\x0bB\n\n"
 
 
 def test_format_sse_event_comment_preserves_trailing_newline():