diff --git a/tests/mixology/version_solver/test_with_lock.py b/tests/mixology/version_solver/test_with_lock.py
index 333f2234c6c..3f6e685c352 100644
--- a/tests/mixology/version_solver/test_with_lock.py
+++ b/tests/mixology/version_solver/test_with_lock.py
@@ -136,7 +136,9 @@ def test_with_compatible_locked_dependencies_use_latest(
     )
 
 
-def test_with_compatible_locked_dependencies_with_extras(root, provider, repo):
+def test_with_compatible_locked_dependencies_with_extras(
+    root: "ProjectPackage", provider: "Provider", repo: "Repository"
+):
     root.add_dependency(Factory.create_dependency("foo", "^1.0"))
 
     package_foo_0 = get_package("foo", "1.0.0")