diff --git a/src/types/complex.rs b/src/types/complex.rs
index 970b07f5bdf..307c1d1e47c 100644
--- a/src/types/complex.rs
+++ b/src/types/complex.rs
@@ -131,7 +131,7 @@ impl<'py> Neg for &'py PyComplex {
 #[cfg(feature = "num-complex")]
 mod complex_conversion {
     use super::*;
-    use crate::{FromPyObject, PyErr, PyObject, PyResult, ToPyObject};
+    use crate::{FromPyObject, PyErr, PyObject, PyResult, ToPyObject, Py};
     use num_complex::Complex;
 
     impl PyComplex {
@@ -151,18 +151,18 @@ mod complex_conversion {
             impl ToPyObject for Complex<$float> {
                 #[inline]
                 fn to_object<'p>(&self, py: Python<'p>) -> &'p PyObject {
-                    crate::IntoPy::<PyObject>::into_py(self.to_owned(), py)
-                }
-            }
-            impl crate::IntoPy<Py<PyObject>> for Complex<$float> {
-                fn into_py(self, py: Python) -> PyObject {
                     unsafe {
                         let raw_obj =
                             ffi::PyComplex_FromDoubles(self.re as c_double, self.im as c_double);
-                        PyObject::from_owned_ptr_or_panic(py, raw_obj)
+                        py.from_owned_ptr(raw_obj)
                     }
                 }
             }
+            impl crate::IntoPy<Py<PyObject>> for Complex<$float> {
+                fn into_py(self, py: Python) -> Py<PyObject> {
+                    self.to_object(py).into()
+                }
+            }
             #[cfg(not(Py_LIMITED_API))]
             #[allow(clippy::float_cmp)] // The comparison is for an error value
             impl<'source> FromPyObject<'source> for Complex<$float> {
@@ -197,30 +197,36 @@ mod complex_conversion {
     complex_conversion!(f32);
     complex_conversion!(f64);
 
-    #[allow(clippy::float_cmp)] // The test wants to ensure that no precision was lost on the Python round-trip
-    #[test]
-    fn from_complex() {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        let complex = Complex::new(3.0, 1.2);
-        let py_c = PyComplex::from_complex(py, complex);
-        assert_eq!(py_c.real(), 3.0);
-        assert_eq!(py_c.imag(), 1.2);
-    }
-    #[test]
-    fn to_from_complex() {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        let val = Complex::new(3.0, 1.2);
-        let obj = val.to_object(py);
-        assert_eq!(obj.extract::<Complex<f64>>(py).unwrap(), val);
-    }
-    #[test]
-    fn from_complex_err() {
-        let gil = Python::acquire_gil();
-        let py = gil.python();
-        let obj = vec![1].to_object(py);
-        assert!(obj.extract::<Complex<f64>>(py).is_err());
+    #[cfg(test)]
+    mod test {
+        use super::*;
+        use crate::ObjectProtocol;
+
+        #[allow(clippy::float_cmp)] // The test wants to ensure that no precision was lost on the Python round-trip
+        #[test]
+        fn from_complex() {
+            let gil = Python::acquire_gil();
+            let py = gil.python();
+            let complex = Complex::new(3.0, 1.2);
+            let py_c = PyComplex::from_complex(py, complex);
+            assert_eq!(py_c.real(), 3.0);
+            assert_eq!(py_c.imag(), 1.2);
+        }
+        #[test]
+        fn to_from_complex() {
+            let gil = Python::acquire_gil();
+            let py = gil.python();
+            let val = Complex::new(3.0, 1.2);
+            let obj = val.to_object(py);
+            assert_eq!(obj.extract::<Complex<f64>>().unwrap(), val);
+        }
+        #[test]
+        fn from_complex_err() {
+            let gil = Python::acquire_gil();
+            let py = gil.python();
+            let obj = vec![1].to_object(py);
+            assert!(obj.extract::<Complex<f64>>().is_err());
+        }
     }
 }
 
diff --git a/src/types/num.rs b/src/types/num.rs
index 0e9ad9712d4..5f203805dbd 100644
--- a/src/types/num.rs
+++ b/src/types/num.rs
@@ -270,13 +270,13 @@ mod bigint_conversion {
                             1,
                             $is_signed,
                         );
-                        PyObject::from_owned_ptr_or_panic(py, obj)
+                        py.from_owned_ptr(obj)
                     }
                 }
             }
             impl IntoPy<Py<PyObject>> for $rust_ty {
-                fn into_py(self, py: Python) -> PyObject {
-                    self.to_object(py)
+                fn into_py(self, py: Python) -> Py<PyObject> {
+                    self.to_object(py).into()
                 }
             }
             impl<'source> FromPyObject<'source> for $rust_ty {
@@ -317,6 +317,7 @@ mod bigint_conversion {
     mod test {
         use super::*;
         use crate::types::{PyDict, PyModule};
+        use crate::ObjectProtocol;
         use indoc::indoc;
         use num_traits::{One, Zero};
 
@@ -415,7 +416,7 @@ mod bigint_conversion {
                     let value = $value;
                     println!("{}: {}", stringify!($T), value);
                     let python_value = value.clone().to_object(py);
-                    let roundtrip_value = python_value.extract::<$T>(py).unwrap();
+                    let roundtrip_value = python_value.extract::<$T>().unwrap();
                     assert_eq!(value, roundtrip_value);
                 };
             }