diff --git a/katran/lib/testing/fplane_testing.py b/katran/lib/testing/fplane_testing.py
index 728535da5..73bd9c3fe 100644
--- a/katran/lib/testing/fplane_testing.py
+++ b/katran/lib/testing/fplane_testing.py
@@ -13,6 +13,8 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+# pyre-unsafe
+
 
 import argparse
 import time