diff --git a/compiler-rt/test/sanitizer_common/ios_commands/iossim_compile.py b/compiler-rt/test/sanitizer_common/ios_commands/iossim_compile.py
--- a/compiler-rt/test/sanitizer_common/ios_commands/iossim_compile.py
+++ b/compiler-rt/test/sanitizer_common/ios_commands/iossim_compile.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, subprocess
 
@@ -20,7 +20,7 @@
         output = args.pop(0)
 
 if output == None:
-    print "No output file name!"
+    print("No output file name!")
     sys.exit(1)
 
 ret = subprocess.call(sys.argv[1:])
diff --git a/compiler-rt/test/sanitizer_common/ios_commands/iossim_env.py b/compiler-rt/test/sanitizer_common/ios_commands/iossim_env.py
--- a/compiler-rt/test/sanitizer_common/ios_commands/iossim_env.py
+++ b/compiler-rt/test/sanitizer_common/ios_commands/iossim_env.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import os, sys, subprocess
 
diff --git a/compiler-rt/test/sanitizer_common/ios_commands/iossim_prepare.py b/compiler-rt/test/sanitizer_common/ios_commands/iossim_prepare.py
--- a/compiler-rt/test/sanitizer_common/ios_commands/iossim_prepare.py
+++ b/compiler-rt/test/sanitizer_common/ios_commands/iossim_prepare.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import json
 
diff --git a/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py b/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
--- a/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
+++ b/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 import glob, os, pipes, sys, subprocess