diff --git a/hendrics/tests/test_fspec.py b/hendrics/tests/test_fspec.py
index ba4f0e84..1053987e 100644
--- a/hendrics/tests/test_fspec.py
+++ b/hendrics/tests/test_fspec.py
@@ -134,6 +134,9 @@ def setup_class(cls):
         cls.ev_fileB = os.path.join(
             cls.datadir, "monol_testB_nustar_fpmb_ev" + HEN_FILE_EXTENSION
         )
+        for fname in [cls.ev_fileA, cls.ev_fileB]:
+            if os.path.exists(fname):
+                os.unlink(fname)
 
         cls.par = _dummy_par("bubububu.par")
         command = "{0} {1}".format(