diff --git a/pyproject.toml b/pyproject.toml
index 0012e4f..7886f04 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,6 @@ docs = [
 ]
 test = [
     'pytest >= 4.6.0',
-    'pytest-openfiles >= 0.5.0',
     'asdf >= 2.8.0',
     'asdf-astropy',
 ]