diff --git a/arrow-pyarrow-integration-testing/src/lib.rs b/arrow-pyarrow-integration-testing/src/lib.rs
index 0f6bdf8e2f7..a493c909142 100644
--- a/arrow-pyarrow-integration-testing/src/lib.rs
+++ b/arrow-pyarrow-integration-testing/src/lib.rs
@@ -152,14 +152,8 @@ fn round_trip_field(array: PyObject, py: Python) -> PyResult<PyObject> {
     to_py_field(&field, py)
 }
 
-#[pyfunction]
-fn total_allocated_bytes() -> PyResult<isize> {
-    Ok(arrow2::total_allocated_bytes())
-}
-
 #[pymodule]
 fn arrow_pyarrow_integration_testing(_py: Python, m: &PyModule) -> PyResult<()> {
-    m.add_function(wrap_pyfunction!(total_allocated_bytes, m)?)?;
     m.add_function(wrap_pyfunction!(round_trip_array, m)?)?;
     m.add_function(wrap_pyfunction!(round_trip_field, m)?)?;
     Ok(())
diff --git a/arrow-pyarrow-integration-testing/tests/test_sql.py b/arrow-pyarrow-integration-testing/tests/test_sql.py
index 5a6da2bdf65..2998e27a0b0 100644
--- a/arrow-pyarrow-integration-testing/tests/test_sql.py
+++ b/arrow-pyarrow-integration-testing/tests/test_sql.py
@@ -33,18 +33,9 @@ def __reduce__(self):
 
 class TestCase(unittest.TestCase):
     def setUp(self):
-        self.old_allocated_rust = (
-            arrow_pyarrow_integration_testing.total_allocated_bytes()
-        )
         self.old_allocated_cpp = pyarrow.total_allocated_bytes()
 
     def tearDown(self):
-        # No leak of Rust
-        self.assertEqual(
-            self.old_allocated_rust,
-            arrow_pyarrow_integration_testing.total_allocated_bytes(),
-        )
-
         # No leak of C++ memory
         self.assertEqual(self.old_allocated_cpp, pyarrow.total_allocated_bytes())
 
diff --git a/src/buffer/mutable.rs b/src/buffer/mutable.rs
index 6fb1bc08460..c5cfa795ff2 100644
--- a/src/buffer/mutable.rs
+++ b/src/buffer/mutable.rs
@@ -233,7 +233,7 @@ impl<T: NativeType> MutableBuffer<T> {
     /// buffer.push(2);
     ///
     /// buffer.shrink_to_fit();
-    /// assert!(buffer.capacity() == 8);
+    /// assert!(buffer.capacity() == 2);
     /// ```
     pub fn shrink_to_fit(&mut self) {
         self.data.shrink_to_fit();