diff --git a/pyproject.toml b/pyproject.toml
index 99439265..2c5c4f70 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = ["pre-commit>=3.0.0"]
-tests = ["docker ~= 7.0", "pytest ~= 8.0", "pytest-cov >= 4,< 6", "pytest-mock ~= 3.14"]
+tests = ["docker ~= 7.0", "pytest ~= 8.0", "pytest-cov >= 4,< 7", "pytest-mock ~= 3.14"]
 docs = [
     "autodoc_pydantic>=2.0.0",
     "pydata-sphinx-theme",