Fixes to make upb's tests compatible with a minimal Docker container.
diff --git a/benchmarks/gen_protobuf_binary_cc.py b/benchmarks/gen_protobuf_binary_cc.py
index 66c2df6..41fb100 100644
--- a/benchmarks/gen_protobuf_binary_cc.py
+++ b/benchmarks/gen_protobuf_binary_cc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Copyright (c) 2009-2021, Google LLC
 # All rights reserved.
diff --git a/benchmarks/gen_synthetic_protos.py b/benchmarks/gen_synthetic_protos.py
index 54003d2..99f83c1 100644
--- a/benchmarks/gen_synthetic_protos.py
+++ b/benchmarks/gen_synthetic_protos.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Copyright (c) 2009-2021, Google LLC
 # All rights reserved.
diff --git a/benchmarks/gen_upb_binary_c.py b/benchmarks/gen_upb_binary_c.py
index d5c0d1d..912d82a 100644
--- a/benchmarks/gen_upb_binary_c.py
+++ b/benchmarks/gen_upb_binary_c.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Copyright (c) 2009-2021, Google LLC
 # All rights reserved.