diff --git a/tests/Makefile.am b/tests/Makefile.am
index 33dfa8b61d0b0f499fb7e0af72b259eed2dcfd79..f6f4d80ff4a5bd4aaee4e75e278aac38f7685869 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1609,7 +1609,6 @@ clean-local:
 	rm -f $(shell find -name H.dat)
 
 	rm -f arima/data1.m arima/data2.m \
-		k_order_perturbation/*.jnl \
 		k_order_perturbation/*.mat \
 		kalman_filter_smoother/data_algo.mat \
 		kalman_filter_smoother/data_Pinf_Pstar.mat