diff --git a/requirements.txt b/requirements.txt
index b8970f686..a034dec27 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ typing_extensions>=3.7.4.1,<4.0.0.0; python_version < "3.8"
 # Development dependencies
 pre-commit>=2.13.0
 cython>=0.25,<3.0
-pytest>=5.2.0
+pytest>=5.2.0,<7.1.0
 pytest-timeout>=1.3.0,<2.0.0
 mock>=2.0.0,<3.0.0
 flake8>=3.8.0,<3.10.0