diff --git a/sharness/t0030-ctl-pin.sh b/sharness/t0030-ctl-pin.sh
index 0eb1343b5..722aaab3a 100755
--- a/sharness/t0030-ctl-pin.sh
+++ b/sharness/t0030-ctl-pin.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 test_description="Test cluster-ctl's pinning and unpinning functionality"
 
diff --git a/sharness/t0050-service-state-upgrade-from-current.sh b/sharness/t0050-service-state-upgrade-from-current.sh
index 517161af1..f724c5e47 100755
--- a/sharness/t0050-service-state-upgrade-from-current.sh
+++ b/sharness/t0050-service-state-upgrade-from-current.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#!/bin/sh
 
 test_description="Test service state 'upgrade' from current version"
 
@@ -14,7 +14,7 @@ test_expect_success IPFS,CLUSTER "cluster-service state upgrade works" '
     ipfs-cluster-ctl pin add "$cid" &&
     sleep 5 &&
     cluster_kill &&
-    ipfs-cluster-service -d --config "test-config" state upgrade &>state-upgrade-cmd.txt
+    ipfs-cluster-service --config "test-config" state upgrade
 '
 
 # previous test kills the cluster, we need to re-start
diff --git a/sharness/t0051-service-state-upgrade-from-old.sh b/sharness/t0051-service-state-upgrade-from-old.sh
index b5b14aeca..26acda7f7 100755
--- a/sharness/t0051-service-state-upgrade-from-old.sh
+++ b/sharness/t0051-service-state-upgrade-from-old.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#!/bin/sh
 
 test_description="Test service state upgrade v1 -> v2 and v2 -> v2"
 IPFS_OUTPUT="/dev/stderr" # change for debugging