diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index baf0924..5fb70a8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -28,7 +28,7 @@ jobs:
           emoji: true
           verbose: true
           job-summary: true
-          custom-arguments: '-c nwb_linkml/pyproject.toml'
+          custom-arguments: 'nwb_linkml/tests'
 
       - run: "coveralls --service=github"
         env:
diff --git a/nwb_linkml/pyproject.toml b/nwb_linkml/pyproject.toml
index 66bb509..800c43e 100644
--- a/nwb_linkml/pyproject.toml
+++ b/nwb_linkml/pyproject.toml
@@ -68,7 +68,8 @@ addopts = [
     "--cov-append"
 ]
 testpaths = [
-    "tests"
+    "tests",
+    'nwb_linkml/tests'
 ]
 
 [tool.coverage.run]