diff --git a/pyproject.toml b/pyproject.toml
index 2fc29114..fbd864c9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ dynamic = ["version", "dependencies", "optional-dependencies"]
 
 [tool.setuptools.dynamic]
 dependencies = {file = ["requirements.txt"]}
-optional-dependencies = {test = { file = ["test-requirements.txt"] }}
+optional-dependencies = {test = { file = ["test_requirements.txt"] }}
 
 [project.scripts]
 buildrunner = "buildrunner.cli:main"