diff --git a/pandas/core/dtypes/cast.py b/pandas/core/dtypes/cast.py
index 21e04bc1badf3..5809acbd55380 100644
--- a/pandas/core/dtypes/cast.py
+++ b/pandas/core/dtypes/cast.py
@@ -1841,8 +1841,10 @@ def maybe_cast_to_integer_array(
             f"casted to the dtype {dtype}"
         ) from err
 
-    if np.array_equal(arr, casted):
-        return casted
+    with warnings.catch_warnings():
+        warnings.filterwarnings("ignore")
+        if np.array_equal(arr, casted):
+            return casted
 
     # We do this casting to allow for proper
     # data and dtype checking.
diff --git a/pandas/tests/frame/methods/test_combine_first.py b/pandas/tests/frame/methods/test_combine_first.py
index 90df28ce74454..30aef0bc0ec98 100644
--- a/pandas/tests/frame/methods/test_combine_first.py
+++ b/pandas/tests/frame/methods/test_combine_first.py
@@ -400,7 +400,11 @@ def test_combine_first_string_dtype_only_na(self, nullable_string_dtype):
             pa_version_under7p0 and nullable_string_dtype == "string[pyarrow]",
         ):
             df2.set_index(["a", "b"], inplace=True)
-        result = df.combine_first(df2)
+        with tm.maybe_produces_warning(
+            PerformanceWarning,
+            pa_version_under7p0 and nullable_string_dtype == "string[pyarrow]",
+        ):
+            result = df.combine_first(df2)
         with tm.maybe_produces_warning(
             PerformanceWarning,
             pa_version_under7p0 and nullable_string_dtype == "string[pyarrow]",