diff --git a/test/asm/test.sh b/test/asm/test.sh
index c8fca9d5..5d85142f 100755
--- a/test/asm/test.sh
+++ b/test/asm/test.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 fname=$(mktemp)
 rc=0
 
diff --git a/test/asm/update-refs.sh b/test/asm/update-refs.sh
index b2f88907..d956ff31 100755
--- a/test/asm/update-refs.sh
+++ b/test/asm/update-refs.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 fname=$(mktemp)
 
 for i in *.asm; do
diff --git a/test/link/test.sh b/test/link/test.sh
index 6d012831..275dd891 100755
--- a/test/link/test.sh
+++ b/test/link/test.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 otemp=$(mktemp)
 gbtemp=$(mktemp)
 gbtemp2=$(mktemp)
diff --git a/test/link/update-refs.sh b/test/link/update-refs.sh
index 169808d6..10f141b1 100755
--- a/test/link/update-refs.sh
+++ b/test/link/update-refs.sh
@@ -1,3 +1,4 @@
+#!/bin/sh
 otemp=$(mktemp)
 gbtemp=$(mktemp)