diff --git a/tests/functional/ext/code_style/code_style_consider_using_tuple.py b/tests/functional/ext/code_style/code_style_consider_using_tuple.py
index d243960795d..996e6b8b016 100644
--- a/tests/functional/ext/code_style/code_style_consider_using_tuple.py
+++ b/tests/functional/ext/code_style/code_style_consider_using_tuple.py
@@ -29,3 +29,31 @@
 # Don't emit warning for sets as this is handled by builtin checker
 (x for x in {1, 2, 3})  # [use-sequence-for-iteration]
 [x for x in {*var, 2}]  # [use-sequence-for-iteration]
+
+
+# -----
+# Suggest tuple for `in` comparisons
+x in var
+x in {1, 2, 3}
+x in (1, 2, 3)
+x in [1, 2, 3]  # [consider-using-tuple]
+
+if x in var:
+    pass
+if x in {1, 2, 3}:
+    pass
+if x in (1, 2, 3):
+    pass
+if x in [1, 2, 3]:  # [consider-using-tuple]
+    pass
+
+42 if x in [1, 2, 3] else None  # [consider-using-tuple]
+assert x in [1, 2, 3]  # [consider-using-tuple]
+(x for x in var if x in [1, 2, 3])  # [consider-using-tuple]
+while x in [1, 2, 3]:  # [consider-using-tuple]
+    break
+
+# Stacked operators, rightmost pair is evaluated first
+# Doesn't make much sense in practice since `in` will only return `bool`
+True == x in [1, 2, 3]  # [consider-using-tuple]  # noqa: E712
+1 >= x in [1, 2, 3]  # [consider-using-tuple]  # noqa: E712
diff --git a/tests/functional/ext/code_style/code_style_consider_using_tuple.txt b/tests/functional/ext/code_style/code_style_consider_using_tuple.txt
index 167c8c0371b..02e18d910ba 100644
--- a/tests/functional/ext/code_style/code_style_consider_using_tuple.txt
+++ b/tests/functional/ext/code_style/code_style_consider_using_tuple.txt
@@ -6,3 +6,11 @@ consider-using-tuple:23:9::Consider using an in-place tuple instead of list
 consider-using-tuple:26:12::Consider using an in-place tuple instead of list
 use-sequence-for-iteration:30:12::Use a sequence type when iterating over values
 use-sequence-for-iteration:31:12::Use a sequence type when iterating over values
+consider-using-tuple:39:5::Consider using an in-place tuple instead of list
+consider-using-tuple:47:8::Consider using an in-place tuple instead of list
+consider-using-tuple:50:11::Consider using an in-place tuple instead of list
+consider-using-tuple:51:12::Consider using an in-place tuple instead of list
+consider-using-tuple:52:24::Consider using an in-place tuple instead of list
+consider-using-tuple:53:11::Consider using an in-place tuple instead of list
+consider-using-tuple:58:13::Consider using an in-place tuple instead of list
+consider-using-tuple:59:10::Consider using an in-place tuple instead of list