diff --git a/ci/test.sh b/ci/test.sh
index 9a45586e..9c03cec7 100755
--- a/ci/test.sh
+++ b/ci/test.sh
@@ -55,7 +55,7 @@ run_tests() {
             echo "core_test failed: ${core_test_res}, retrying (try=${try})"
 
             # Wait a while for sockets to be all cleaned up by the kernel
-            sleep $[10 + (${RANDOM} % 30)]
+            sleep $[60 + (${RANDOM} % 30)]
         fi
 
         ${TIMEOUT_CMD} ${TIMEOUT_TIME_ARG} ${TIMEOUT_SEC-${TIMEOUT_DEFAULT}} ./core_test