diff --git a/tests/tests/cpython_reference_project/common.py b/tests/tests/cpython_reference_project/common.py
index 549288a..9d406fe 100644
--- a/tests/tests/cpython_reference_project/common.py
+++ b/tests/tests/cpython_reference_project/common.py
@@ -1 +1,16 @@
-DLL = "../../../target/debug/interoptopus_reference_project.dll"
\ No newline at end of file
+import platform
+
+if platform.uname()[0] == "Linux":
+    prefix = "lib"
+else:
+    prefix = ""
+
+
+if platform.uname()[0] == "Windows":
+    suffix = ".dll"
+elif platform.uname()[0] == "Linux":
+    suffix = ".so"
+else:
+    suffix = ""
+
+DLL = "../../../target/debug/" + prefix + "interoptopus_reference_project" + suffix