diff --git a/examples/C/rename.sh b/examples/C/rename.sh
index 943ac7054..88ae37867 100755
--- a/examples/C/rename.sh
+++ b/examples/C/rename.sh
@@ -1,4 +1,4 @@
-#!/bin/ksh
+#!/bin/sh
 # (C) Copyright 2005- ECMWF.
 #
 # This software is licensed under the terms of the Apache Licence Version 2.0
diff --git a/tests/timing.sh b/tests/timing.sh
deleted file mode 100755
index 10a7b510e..000000000
--- a/tests/timing.sh
+++ /dev/null
@@ -1 +0,0 @@
-./timing ../data/reduced_latlon_surface.grib1 > /dev/null
diff --git a/tests/utils.sh b/tests/utils.sh
index ea13741cd..d51373a3d 100644
--- a/tests/utils.sh
+++ b/tests/utils.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 # (C) Copyright 2005- ECMWF.
 #
 # This software is licensed under the terms of the Apache Licence Version 2.0