diff --git a/test/core/end2end/gen_build_yaml.py b/test/core/end2end/gen_build_yaml.py
index b11335e2f08..01adcf389eb 100755
--- a/test/core/end2end/gen_build_yaml.py
+++ b/test/core/end2end/gen_build_yaml.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python2.7
 # Copyright 2015 gRPC authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,6 +15,7 @@
 
 """Generates the appropriate build.json data for all the end2end tests."""
 
+from __future__ import print_function
 
 import yaml
 import collections
@@ -405,7 +405,7 @@ def main():
           for t in END2END_TESTS.keys()
       )
   }
-  print yaml.dump(json)
+  print(yaml.dump(json))
 
 
 if __name__ == '__main__':
diff --git a/tools/buildgen/generate_build_additions.sh b/tools/buildgen/generate_build_additions.sh
index e072752355f..b1246c13fbe 100755
--- a/tools/buildgen/generate_build_additions.sh
+++ b/tools/buildgen/generate_build_additions.sh
@@ -33,6 +33,6 @@ gen_build_files=""
 for gen_build_yaml in $gen_build_yaml_dirs
 do
   output_file=`mktemp /tmp/genXXXXXX`
-  $gen_build_yaml/gen_build_yaml.py > $output_file
+  python $gen_build_yaml/gen_build_yaml.py > $output_file
   gen_build_files="$gen_build_files $output_file"
 done
diff --git a/tools/buildgen/generate_projects.py b/tools/buildgen/generate_projects.py
index 40d90953606..bbbf1271aba 100755
--- a/tools/buildgen/generate_projects.py
+++ b/tools/buildgen/generate_projects.py
@@ -1,5 +1,3 @@
-#!/usr/bin/env python2.7
-
 # Copyright 2015 gRPC authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/tools/buildgen/generate_projects.sh b/tools/buildgen/generate_projects.sh
index 95969c8a340..fa0a4d82092 100755
--- a/tools/buildgen/generate_projects.sh
+++ b/tools/buildgen/generate_projects.sh
@@ -30,6 +30,6 @@ fi
 
 . tools/buildgen/generate_build_additions.sh
 
-tools/buildgen/generate_projects.py build.yaml $gen_build_files $*
+python tools/buildgen/generate_projects.py build.yaml $gen_build_files $*
 
 rm $gen_build_files