diff --git a/third_party/def_parser/BUILD b/third_party/def_parser/BUILD
index 0f281e4da38411..47cecc7cacc64a 100644
--- a/third_party/def_parser/BUILD
+++ b/third_party/def_parser/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_test")
+
 licenses(["notice"])  # 3-clause BSD
 
 package(
diff --git a/third_party/protobuf/3.6.1/BUILD b/third_party/protobuf/3.6.1/BUILD
index a24d0c9699024f..6042e7f21eab12 100644
--- a/third_party/protobuf/3.6.1/BUILD
+++ b/third_party/protobuf/3.6.1/BUILD
@@ -21,6 +21,7 @@ config_setting(
 
 load(":protobuf.bzl", "py_proto_library")
 load(":compiler_config_setting.bzl", "create_compiler_config_setting")
+load("//tools/python:private/defs.bzl", "py_library")
 
 filegroup(
     name = "srcs",
diff --git a/third_party/protobuf/3.6.1/protobuf.bzl b/third_party/protobuf/3.6.1/protobuf.bzl
index 50f162deeba6a6..4f6821228fe339 100644
--- a/third_party/protobuf/3.6.1/protobuf.bzl
+++ b/third_party/protobuf/3.6.1/protobuf.bzl
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library", "py_test")
+
 def _GetPath(ctx, path):
     if ctx.label.workspace_root:
         return ctx.label.workspace_root + "/" + path
@@ -383,7 +385,7 @@ def py_proto_library(
     if default_runtime and not default_runtime in py_libs + deps:
         py_libs = py_libs + [default_runtime]
 
-    native.py_library(
+    py_library(
         name = name,
         srcs = outs + py_extra_srcs,
         deps = py_libs + deps,
@@ -406,7 +408,7 @@ def internal_protobuf_py_tests(
     """
     for m in modules:
         s = "python/google/protobuf/internal/%s.py" % m
-        native.py_test(
+        py_test(
             name = "py_%s" % m,
             srcs = [s],
             main = s,
diff --git a/third_party/protobuf/3.6.1/six.BUILD b/third_party/protobuf/3.6.1/six.BUILD
index fb0b3604cdf443..b09dbcb7e61be0 100644
--- a/third_party/protobuf/3.6.1/six.BUILD
+++ b/third_party/protobuf/3.6.1/six.BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 genrule(
   name = "copy_six",
   srcs = ["six-1.10.0/six.py"],
diff --git a/third_party/py/abseil/BUILD b/third_party/py/abseil/BUILD
index 5bf0a22e4cdd19..04abed6e166a32 100644
--- a/third_party/py/abseil/BUILD
+++ b/third_party/py/abseil/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 licenses(["notice"])
 
 filegroup(
diff --git a/third_party/py/concurrent/BUILD b/third_party/py/concurrent/BUILD
index ccc3faa03d3594..aacaf6f3c2f159 100644
--- a/third_party/py/concurrent/BUILD
+++ b/third_party/py/concurrent/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 licenses(["notice"])
 
 filegroup(
diff --git a/third_party/py/gflags/BUILD b/third_party/py/gflags/BUILD
index 35f06748e7286d..bff5cb05d4c7f0 100644
--- a/third_party/py/gflags/BUILD
+++ b/third_party/py/gflags/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 licenses(["notice"])
 
 filegroup(
diff --git a/third_party/py/mock/BUILD b/third_party/py/mock/BUILD
index 2d4961de9e696d..1eedc4d67ac951 100644
--- a/third_party/py/mock/BUILD
+++ b/third_party/py/mock/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 licenses(["notice"])
 
 filegroup(
diff --git a/third_party/py/six/BUILD b/third_party/py/six/BUILD
index fa060cb6aed82c..cc026b6b2b31e8 100644
--- a/third_party/py/six/BUILD
+++ b/third_party/py/six/BUILD
@@ -1,3 +1,5 @@
+load("//tools/python:private/defs.bzl", "py_library")
+
 licenses(["notice"])
 
 filegroup(