diff --git a/tests/Fixtures/bin/post-process-as-file-error.bash b/tests/Fixtures/bin/post-process-as-file-error.bash
index 139c54b31..163d7cc75 100755
--- a/tests/Fixtures/bin/post-process-as-file-error.bash
+++ b/tests/Fixtures/bin/post-process-as-file-error.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 source "`cd $(dirname ${BASH_SOURCE[0]}) && pwd`/post-process-as-file.bash"
 
diff --git a/tests/Fixtures/bin/post-process-as-file.bash b/tests/Fixtures/bin/post-process-as-file.bash
index 612e87b3c..7e9964bad 100755
--- a/tests/Fixtures/bin/post-process-as-file.bash
+++ b/tests/Fixtures/bin/post-process-as-file.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 source "`cd $(dirname ${BASH_SOURCE[0]}) && pwd`/post-process-common.bash"
 
diff --git a/tests/Fixtures/bin/post-process-as-stdin-error.bash b/tests/Fixtures/bin/post-process-as-stdin-error.bash
index 7cfd5be91..5600b9a97 100755
--- a/tests/Fixtures/bin/post-process-as-stdin-error.bash
+++ b/tests/Fixtures/bin/post-process-as-stdin-error.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 source "`cd $(dirname ${BASH_SOURCE[0]}) && pwd`/post-process-as-stdin.bash"
 
diff --git a/tests/Fixtures/bin/post-process-as-stdin.bash b/tests/Fixtures/bin/post-process-as-stdin.bash
index 856304ed6..26eff133a 100755
--- a/tests/Fixtures/bin/post-process-as-stdin.bash
+++ b/tests/Fixtures/bin/post-process-as-stdin.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 source "`cd $(dirname ${BASH_SOURCE[0]}) && pwd`/post-process-common.bash"
 
diff --git a/tests/Fixtures/bin/post-process-common.bash b/tests/Fixtures/bin/post-process-common.bash
index 2c870b78f..ed219ea1e 100755
--- a/tests/Fixtures/bin/post-process-common.bash
+++ b/tests/Fixtures/bin/post-process-common.bash
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 function writeScriptInformation()
 {
@@ -36,7 +36,7 @@ function writeScriptInformation()
 
 function writeScriptDebugFile()
 {
-  local debugFile="/tmp/post-process-fixture-bin.log"
+  local debugFile="${TMPDIR:-/tmp}/post-process-fixture-bin.log"
 
   if read -t 0; then
     cat | tee "${debugFile}"