diff --git a/src/tests/ftest/util/file_count_test_base.py b/src/tests/ftest/util/file_count_test_base.py
index 58b1a49f0a5..be21183c97a 100644
--- a/src/tests/ftest/util/file_count_test_base.py
+++ b/src/tests/ftest/util/file_count_test_base.py
@@ -69,7 +69,6 @@ def run_file_count(self):
         dir_oclass = None
         apis = self.params.get("api", "/run/largefilecount/*")
         hdf5_plugin_path = self.params.get("plugin_path", '/run/hdf5_vol/*')
-        mount_dir = self.params.get("mount_dir", "/run/dfuse/*")
         ior_np = self.params.get("np", '/run/ior/client_processes/*', 1)
         ior_ppn = self.params.get("ppn", '/run/ior/client_processes/*', None)
         mdtest_np = self.params.get("np", '/run/mdtest/client_processes/*', 1)
@@ -119,8 +118,7 @@ def run_file_count(self):
                     self.ppn = ior_ppn
                     if api == 'HDF5-VOL':
                         self.ior_cmd.api.update('HDF5')
-                        self.run_ior_with_pool(
-                            create_pool=False, plugin_path=hdf5_plugin_path, mount_dir=mount_dir)
+                        self.run_ior_with_pool(create_pool=False, plugin_path=hdf5_plugin_path)
                     elif self.ior_cmd.api.value == 'POSIX':
                         self.run_ior_with_pool(create_pool=False, intercept=intercept)
                     else: