diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 000000000..fdc329bb2
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,6 @@
+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
+
+[build-system]
+requires = ['setuptools', 'wheel']
+build-backend = 'setuptools.build_meta'
diff --git a/tests/test_venv.py b/tests/test_venv.py
index 4bf1eb029..9e91157ce 100644
--- a/tests/test_venv.py
+++ b/tests/test_venv.py
@@ -139,7 +139,7 @@ def testp():
 
         # Install everything.
         run_in_venv(
-            "python -m pip install --no-index " +
+            "python -m pip install " +
             "./third_pkg " +
             "-e ./another_pkg " +
             "-e ./bug888/app -e ./bug888/plugin " +