diff --git a/lua/tests/010-load.lua b/lua/tests/010-load.lua
index 7a4b19280..1e12bda3a 100755
--- a/lua/tests/010-load.lua
+++ b/lua/tests/010-load.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/015-globals.lua b/lua/tests/015-globals.lua
index 92f83174f..fc1389656 100755
--- a/lua/tests/015-globals.lua
+++ b/lua/tests/015-globals.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/020-create.lua b/lua/tests/020-create.lua
index 75c650a05..22b028726 100755
--- a/lua/tests/020-create.lua
+++ b/lua/tests/020-create.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/025-create-flags.lua b/lua/tests/025-create-flags.lua
index ddaa97bc6..63bd2a5ca 100755
--- a/lua/tests/025-create-flags.lua
+++ b/lua/tests/025-create-flags.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/027-create-multiple.lua b/lua/tests/027-create-multiple.lua
index af2a2adca..6a819c064 100755
--- a/lua/tests/027-create-multiple.lua
+++ b/lua/tests/027-create-multiple.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/030-config.lua b/lua/tests/030-config.lua
index a5a63ee06..811509baf 100755
--- a/lua/tests/030-config.lua
+++ b/lua/tests/030-config.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/050-lvcreate.lua b/lua/tests/050-lvcreate.lua
index 4b1e51beb..9e066b450 100755
--- a/lua/tests/050-lvcreate.lua
+++ b/lua/tests/050-lvcreate.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/060-readdir.lua b/lua/tests/060-readdir.lua
index 00f594fd8..4f63d8de3 100755
--- a/lua/tests/060-readdir.lua
+++ b/lua/tests/060-readdir.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/070-optargs.lua b/lua/tests/070-optargs.lua
index 31155b30a..8e15808a3 100755
--- a/lua/tests/070-optargs.lua
+++ b/lua/tests/070-optargs.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/400-events.lua b/lua/tests/400-events.lua
index af1618cea..b9b80dc9f 100755
--- a/lua/tests/400-events.lua
+++ b/lua/tests/400-events.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/400-progress.lua b/lua/tests/400-progress.lua
index 728f4aab1..2ef7b3920 100755
--- a/lua/tests/400-progress.lua
+++ b/lua/tests/400-progress.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.
diff --git a/lua/tests/900-errors.lua b/lua/tests/900-errors.lua
index 7dc45a994..628e1be33 100755
--- a/lua/tests/900-errors.lua
+++ b/lua/tests/900-errors.lua
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- lua -*-
-test -z "$LUA" /usr/bin/lua/usr/bin/lua LUA=/usr/bin/lua
+test -z "$LUA" && LUA=/usr/bin/lua
 exec $LUA << END_OF_FILE
 -- libguestfs Lua bindings -*- lua -*-
 -- Copyright (C) 2012 Red Hat Inc.