diff --git a/qa/tasks/cephfs/test_admin.py b/qa/tasks/cephfs/test_admin.py
index 5708f7671bc..f322fb4f8cc 100644
--- a/qa/tasks/cephfs/test_admin.py
+++ b/qa/tasks/cephfs/test_admin.py
@@ -121,6 +121,7 @@ class TestAdminCommands(CephFSTestCase):
         That a new file system warns/fails with an EC default data pool.
         """
 
+        self.mount_a.umount_wait(require_clean=True)
         self.mds_cluster.delete_all_filesystems()
         n = "test_new_default_ec"
         self._setup_ec_pools(n)
@@ -139,6 +140,7 @@ class TestAdminCommands(CephFSTestCase):
         That a new file system succeeds with an EC default data pool with --force.
         """
 
+        self.mount_a.umount_wait(require_clean=True)
         self.mds_cluster.delete_all_filesystems()
         n = "test_new_default_ec_force"
         self._setup_ec_pools(n)
@@ -149,6 +151,7 @@ class TestAdminCommands(CephFSTestCase):
         That a new file system fails with an EC default data pool without overwrite.
         """
 
+        self.mount_a.umount_wait(require_clean=True)
         self.mds_cluster.delete_all_filesystems()
         n = "test_new_default_ec_no_overwrite"
         self._setup_ec_pools(n, overwrites=False)
@@ -176,6 +179,7 @@ class TestAdminCommands(CephFSTestCase):
         """
         That the application metadata set on the pools of a newly created filesystem are as expected.
         """
+        self.mount_a.umount_wait(require_clean=True)
         self.mds_cluster.delete_all_filesystems()
         fs_name = "test_fs_new_pool_application"
         keys = ['metadata', 'data']