diff --git a/performance-test/M00-new.sh b/performance-test/M00-new.sh
index aab36e69..5858ab33 100755
--- a/performance-test/M00-new.sh
+++ b/performance-test/M00-new.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='notmuch new'
 
diff --git a/performance-test/M01-dump-restore.sh b/performance-test/M01-dump-restore.sh
index 32ab8dc9..7850b411 100755
--- a/performance-test/M01-dump-restore.sh
+++ b/performance-test/M01-dump-restore.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='dump and restore'
 
diff --git a/performance-test/M02-show.sh b/performance-test/M02-show.sh
index 2e218fd3..40c5d4d7 100755
--- a/performance-test/M02-show.sh
+++ b/performance-test/M02-show.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='show'
 
diff --git a/performance-test/M03-search.sh b/performance-test/M03-search.sh
index 343f5c7c..a73a36ab 100755
--- a/performance-test/M03-search.sh
+++ b/performance-test/M03-search.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='search'
 
diff --git a/performance-test/M04-reply.sh b/performance-test/M04-reply.sh
index 3c1205db..3b0f9e78 100755
--- a/performance-test/M04-reply.sh
+++ b/performance-test/M04-reply.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='search'
 
diff --git a/performance-test/M05-reindex.sh b/performance-test/M05-reindex.sh
index 17e2c824..8ea7e7ee 100755
--- a/performance-test/M05-reindex.sh
+++ b/performance-test/M05-reindex.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='reindex'
 
diff --git a/performance-test/M06-insert.sh b/performance-test/M06-insert.sh
index 5ae0656a..12330c76 100755
--- a/performance-test/M06-insert.sh
+++ b/performance-test/M06-insert.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='search'
 
diff --git a/performance-test/T00-new.sh b/performance-test/T00-new.sh
index 25391136..a14dd13f 100755
--- a/performance-test/T00-new.sh
+++ b/performance-test/T00-new.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='notmuch new'
 
diff --git a/performance-test/T01-dump-restore.sh b/performance-test/T01-dump-restore.sh
index 12f12e66..2a53e3b8 100755
--- a/performance-test/T01-dump-restore.sh
+++ b/performance-test/T01-dump-restore.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='dump and restore'
 
diff --git a/performance-test/T02-tag.sh b/performance-test/T02-tag.sh
index 8c5dfd68..9c895d6a 100755
--- a/performance-test/T02-tag.sh
+++ b/performance-test/T02-tag.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='tagging'
 
diff --git a/performance-test/T03-reindex.sh b/performance-test/T03-reindex.sh
index 8e0a77f4..8db52a33 100755
--- a/performance-test/T03-reindex.sh
+++ b/performance-test/T03-reindex.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='reindexing'
 
diff --git a/performance-test/T04-thread-subquery.sh b/performance-test/T04-thread-subquery.sh
index 665d5a64..ba81f383 100755
--- a/performance-test/T04-thread-subquery.sh
+++ b/performance-test/T04-thread-subquery.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 test_description='thread subqueries'