diff --git a/CLAUDE.md b/CLAUDE.md
index feabf54d..b37a3693 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -13,7 +13,7 @@
 uv venv .venv && source .venv/bin/activate
 uv pip install -e ".[dev,test,docs,examples]"
 git submodule update --init --recursive  # fetch test data
-unittest tests/ --cov
+python -m unittest discover tests
 ```
 
 ## Package Structure
diff --git a/pyproject.toml b/pyproject.toml
index d7177d48..c1b314ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -132,7 +132,9 @@ exclude = [
     "*.egg-info",
     "hed/_version.py",  # Auto-generated by setuptools-scm
     "spec_tests/hed-examples",
+    "spec_tests/hed-schemas",
     "spec_tests/hed-specification",
+    "spec_tests/hed-tests",
     ".status",
 ]
 
diff --git a/spec_tests/hed-schemas b/spec_tests/hed-schemas
index ec0d1523..3266c73f 160000
--- a/spec_tests/hed-schemas
+++ b/spec_tests/hed-schemas
@@ -1 +1 @@
-Subproject commit ec0d1523e6bb8c2ba5a20118dd1298ec767b84ea
+Subproject commit 3266c73f2aa3e42fb80092a699e0b3a7ca16be27
diff --git a/spec_tests/hed-tests b/spec_tests/hed-tests
index f1477911..40a8bd66 160000
--- a/spec_tests/hed-tests
+++ b/spec_tests/hed-tests
@@ -1 +1 @@
-Subproject commit f147791132ba6a451bacb72468f61568e6b86959
+Subproject commit 40a8bd6670982b73ad492ab0d7eae45c1d2e7832