diff --git a/test/lib/test b/test/lib/test
index 7259383..558d0f0 100755
--- a/test/lib/test
+++ b/test/lib/test
@@ -68,6 +68,8 @@ test_iperf3() {
 		'for i in $(seq 0 '${__procs}'); do rm s${i}.json; done'
 
 	TEST_ONE_subs="$(list_add_pair "${TEST_ONE_subs}" "__${__var}__" "${__bw}" )"
+
+	sleep 3		# Wait for kernel to free up ports
 }
 
 test_one_line() {