diff --git a/source/ports/node_port/test/index.js b/source/ports/node_port/test/index.js
index bf5b04f4f..8b56c6f2a 100644
--- a/source/ports/node_port/test/index.js
+++ b/source/ports/node_port/test/index.js
@@ -204,10 +204,10 @@ describe('metacall', () => {
 			assert.strictEqual(py_encode_basestring_ascii('asd'), '"asd"');
 		});
 		it('require (py submodule dependency)', () => {
-			// Require the 'op' submodule from 'fn' Python package
-			const { foldr, call } = require('fn.op');
+			// Require the 'core' submodule from 'rsa' Python package
+			const { encrypt_int } = require('rsa.core');
 
-			assert.strictEqual(foldr(call, 10)([s => s * s, k => k + 10]), 400);
+			assert.strictEqual(encrypt_int(3, 2, 5), 4);
 		});
 		it('require (rb)', () => {
 			const cache = require('./cache.rb');
diff --git a/source/tests/metacall_load_configuration_node_python_test/CMakeLists.txt b/source/tests/metacall_load_configuration_node_python_test/CMakeLists.txt
index 5682eb736..79af6a9a9 100644
--- a/source/tests/metacall_load_configuration_node_python_test/CMakeLists.txt
+++ b/source/tests/metacall_load_configuration_node_python_test/CMakeLists.txt
@@ -96,6 +96,9 @@ target_compile_definitions(${target}
 	PRIVATE
 	${DEFAULT_COMPILE_DEFINITIONS}
 
+	# Python Port path
+	METACALL_PYTHON_PORT_PATH="${CMAKE_SOURCE_DIR}/source/ports/py_port"
+
 	# NodeJS Port path
 	METACALL_NODE_PORT_PATH="${CMAKE_SOURCE_DIR}/source/ports/node_port/index.js"
 
diff --git a/source/tests/metacall_load_configuration_node_python_test/source/metacall_load_configuration_node_python_test.cpp b/source/tests/metacall_load_configuration_node_python_test/source/metacall_load_configuration_node_python_test.cpp
index 8e1272351..1957d374e 100644
--- a/source/tests/metacall_load_configuration_node_python_test/source/metacall_load_configuration_node_python_test.cpp
+++ b/source/tests/metacall_load_configuration_node_python_test/source/metacall_load_configuration_node_python_test.cpp
@@ -34,6 +34,8 @@ TEST_F(metacall_load_configuration_node_python_test, DefaultConstructor)
 
 	ASSERT_EQ((int)0, (int)metacall_initialize());
 
+	ASSERT_EQ((int)0, (int)metacall_execution_path("py", METACALL_PYTHON_PORT_PATH));
+
 	static const char buffer[] =
 		"const { metacall_load_from_configuration_export } = require('" METACALL_NODE_PORT_PATH "');\n"
 		"const config = metacall_load_from_configuration_export('" METACALL_TEST_CONFIG_PATH "');\n"
diff --git a/tools/metacall-environment.ps1 b/tools/metacall-environment.ps1
index 9a2001e5f..0fd276972 100644
--- a/tools/metacall-environment.ps1
+++ b/tools/metacall-environment.ps1
@@ -101,7 +101,6 @@ function sub-python {
 	pip3 install setuptools
 	pip3 install wheel
 	pip3 install rsa
-	pip3 install fn
 	pip3 install scipy
 	pip3 install numpy
 	pip3 install scikit-learn
diff --git a/tools/metacall-environment.sh b/tools/metacall-environment.sh
index 622ac9832..99e102806 100755
--- a/tools/metacall-environment.sh
+++ b/tools/metacall-environment.sh
@@ -113,7 +113,6 @@ sub_python(){
 	$SUDO_CMD pip3 install setuptools
 	$SUDO_CMD pip3 install wheel
 	$SUDO_CMD pip3 install rsa
-	$SUDO_CMD pip3 install fn
 	$SUDO_CMD pip3 install scipy
 	$SUDO_CMD pip3 install numpy
 	$SUDO_CMD pip3 install scikit-learn