diff --git a/tests/100-lines.args b/tests/100-lines.args
index 8cf38fc..78472e6 100644
--- a/tests/100-lines.args
+++ b/tests/100-lines.args
@@ -1 +1 @@
--- sh -c 'for i in `seq 1 100`; do echo line $i to stdout; sleep 0; echo line $i to stderr 1>&2; sleep 0; done'
+-- sh -c 'for i in `seq 1 100`; do echo line $i to stdout; sleep 0.01; echo line $i to stderr 1>&2; sleep 0.01; done'
diff --git a/tests/15-factorial.args b/tests/15-factorial.args
index 2da3769..8d0405f 100644
--- a/tests/15-factorial.args
+++ b/tests/15-factorial.args
@@ -1 +1 @@
--- sh -c 'for i in $(seq 1 15); do echo "line $i to stdout"; sleep 0; for j in $(seq 1 $i); do echo "line $j to stderr" 1>&2; sleep 0; done; done'
+-- sh -c 'for i in $(seq 1 15); do echo "line $i to stdout"; sleep 0.01; for j in $(seq 1 $i); do echo "line $j to stderr" 1>&2; sleep 0.01; done; done'