diff --git a/tests/test_digest.py b/tests/test_digest.py
index 0bcb5603585359984c3b19dd44f54df3a118048a..e52af5dd9684d2564c5e859be20daee5aea59980 100644
--- a/tests/test_digest.py
+++ b/tests/test_digest.py
@@ -403,7 +403,7 @@ def test_digest_from_input(capsys, tmpdir):
     fastq_file = tmpdir.join("test.fastq")
     fastq_file.write("@Fake1\nWQSDESDFZQSDESDF\n+Fake1\nnWQSDESDFZQSDESDF\n@Fa"\
                      "ke2\nNPHARDORCOMPLET\n+Fake2\nnNPHARDORCOMPLET\n")
-    res = digest.digest_from_input(fastq_file, enzymes, mode)
+    res = digest.digest_from_input(str(fastq_file), enzymes, mode)
     assert res[0][0].__repr__() == "Number of cleavage: 4\nNumber of miss-cle"\
                                    "avage: 0\nPositions of miss-cleavage: []"\
                                    "\nRatio of miss-cleavage: 0.0\nPeptides: "\