diff --git a/pyupgrade/_plugins/versioned_branches.py b/pyupgrade/_plugins/versioned_branches.py
index 05c776ac..1ec4eda6 100644
--- a/pyupgrade/_plugins/versioned_branches.py
+++ b/pyupgrade/_plugins/versioned_branches.py
@@ -46,7 +46,7 @@ def _fix_py2_block(i: int, tokens: list[Token]) -> None:
 
 
 def _fix_remove_block(i: int, tokens: list[Token]) -> None:
-    block = Block.find(tokens, i)
+    block = Block.find(tokens, i, trim_end=True)
     del tokens[block.start:block.end]
 
 
diff --git a/tests/features/versioned_branches_test.py b/tests/features/versioned_branches_test.py
index 6a7e2994..07fcc11b 100644
--- a/tests/features/versioned_branches_test.py
+++ b/tests/features/versioned_branches_test.py
@@ -607,6 +607,16 @@ def test_fix_py3_only_code(s, expected):
 
             id='elif becomes if',
         ),
+        pytest.param(
+            'import sys\n'
+            'if sys.version_info < (3, 6):\n'
+            '    3-5\n'
+            '# comment',
+
+            'import sys\n'
+            '# comment',
+            id='sys.version_info < (3, 6), trailing comment',
+        ),
     ),
 )
 def test_fix_py3x_only_code(s, expected):