diff --git a/tests/test_pdf.py b/tests/test_pdf.py
index 16c10d4f8fbff6c256615d7cc91e7fe149090267..afddb0f961e42aadabef095a05ec2bc972e7e677 100644
--- a/tests/test_pdf.py
+++ b/tests/test_pdf.py
@@ -1,8 +1,7 @@
-import os
 import unittest
 import jppy
 
-PDFS = os.path.expandvars("$JPP_DIR/data/J%p.dat")
+PDFS = "pdfs/J%p.dat"
 
 class TestMuonPDF(unittest.TestCase):
     def test_pdf(self):