diff --git a/qa/zcash/test-depends-sources-mirror.py b/qa/zcash/test-depends-sources-mirror.py
index 8bd94d6d6..d83cca1f1 100755
--- a/qa/zcash/test-depends-sources-mirror.py
+++ b/qa/zcash/test-depends-sources-mirror.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 
 # This script tests that the package mirror at https://download.z.cash/depends-sources/
 # contains all of the packages required to build this version of Zcash.
diff --git a/qa/zcash/updatecheck.py b/qa/zcash/updatecheck.py
index 38a9f3f2c..03391f19e 100755
--- a/qa/zcash/updatecheck.py
+++ b/qa/zcash/updatecheck.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # This script checks for updates to zcashd's dependencies.
 #
diff --git a/src/test/bitcoin-util-test.py b/src/test/bitcoin-util-test.py
index c977a1e28..38c720178 100755
--- a/src/test/bitcoin-util-test.py
+++ b/src/test/bitcoin-util-test.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2014 BitPay, Inc.
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or https://www.opensource.org/licenses/mit-license.php .
diff --git a/src/test/buildenv.py.in b/src/test/buildenv.py.in
index 153f34a3d..674928a96 100644
--- a/src/test/buildenv.py.in
+++ b/src/test/buildenv.py.in
@@ -1,2 +1,2 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 exeext="@EXEEXT@"