diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 01ef0077..96085e88 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         os: [ 'ubuntu-latest' ] # , 'windows-latest', 'macos-latest' ]
-        python_version: [ '3.10' ]
+        python_version: [ '3.9', '3.10', '3.11' ]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d34aea9..9fd40977 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,7 +64,10 @@ if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
     set(PYTHON_LIBRARIES ${Python_LIBRARIES})
     message("Apple - Using Python:${Python_VERSION_MAJOR} - Libraries:${PYTHON_LIBRARIES} - IncludeDirs: ${PYTHON_INCLUDE_DIR}")
   elseif(UNIX)
-    find_package(PythonLibs 3.9...3.11 REQUIRED)
+    find_package(Python 3.9...<3.12 COMPONENTS Interpreter Development REQUIRED)
+    set(Python_FIND_VIRTUALENV FIRST) # (require cmake >= v3.15 and this is the default) use the Python version configured by pyenv if available
+    set(PYTHON_LIBRARIES ${Python_LIBRARIES})
+    set(PYTHON_INCLUDE_DIR ${Python_INCLUDE_DIRS})
     find_package(SpiderMonkey REQUIRED)
   elseif(WIN32)
     find_package(PythonInterp 3.9...3.11 REQUIRED)
diff --git a/src/IntType.cc b/src/IntType.cc
index cb8cdb18..76fc67b2 100644
--- a/src/IntType.cc
+++ b/src/IntType.cc
@@ -58,14 +58,13 @@ IntType::IntType(JSContext *cx, JS::BigInt *bigint) {
   // If the native endianness is also little-endian,
   // we now have consecutive bytes of 8-bit "digits" in little-endian order
   const uint8_t *bytes = const_cast<const uint8_t *>((uint8_t *)jsDigits);
-  if (jsDigitCount == 0) {
-    // Create a new object instead of reusing the object for int 0
-    //    see https://github.com/python/cpython/blob/3.9/Objects/longobject.c#L862
-    //        https://github.com/python/cpython/blob/3.9/Objects/longobject.c#L310
-    pyObject = (PyObject *)_PyLong_New(0);
-  } else {
-    pyObject = _PyLong_FromByteArray(bytes, jsDigitCount * JS_DIGIT_BYTE, true, false);
-  }
+  PyObject *pyIntObj = _PyLong_FromByteArray(bytes, jsDigitCount * JS_DIGIT_BYTE, true, false);
+
+  // Cast to a pythonmonkey.bigint to differentiate it from a normal Python int,
+  //  allowing Py<->JS two-way BigInt conversion.
+  // We don't do `Py_SET_TYPE` because `_PyLong_FromByteArray` may cache and reuse objects for small ints
+  pyObject = PyObject_CallOneArg(PythonMonkey_BigInt, pyIntObj); // pyObject = pythonmonkey.bigint(pyIntObj)
+  Py_DECREF(pyIntObj);
 
   // Set the sign bit
   //    see https://github.com/python/cpython/blob/3.9/Objects/longobject.c#L956
@@ -73,10 +72,6 @@ IntType::IntType(JSContext *cx, JS::BigInt *bigint) {
     ssize_t pyDigitCount = Py_SIZE(pyObject);
     Py_SET_SIZE(pyObject, -pyDigitCount);
   }
-
-  // Cast to a pythonmonkey.bigint to differentiate it from a normal Python int,
-  //  allowing Py<->JS two-way BigInt conversion
-  Py_SET_TYPE(pyObject, (PyTypeObject *)(PythonMonkey_BigInt));
 }
 
 JS::BigInt *IntType::toJsBigInt(JSContext *cx) {
@@ -144,4 +139,4 @@ void IntType::print(std::ostream &os) const {
   os << PyUnicode_AsUTF8(str);
   // https://pythonextensionpatterns.readthedocs.io/en/latest/refcount.html#new-references
   Py_DECREF(str); // free
-}
\ No newline at end of file
+}