diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 2a0660cf..191de8ce 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -16,7 +16,6 @@ conda:
 submodules:
   include:
     - doc/notebooks
-    - pybind11
   recursive: true
 
 
diff --git a/README.md b/README.md
index f8965001..d5665322 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,12 @@ This commit to the **new default branch `main` is the official start of the 1.0
 
 ### Short term
 
-- [ ] fix CI w/ github actions
+- [X] fix CI w/ github actions
 - [ ] Readthedocs with mkdoc
-- [ ] Tests
-- [ ] Notebook tests
-- [ ] Merge PRs #263 #274
-- [ ] Tests
+- [x] Tests
+- [x] Notebook tests
+- [x] Merge PRs #263 #274
+- [x] Tests
 - [ ] Check Polarization notebooks
 
 
diff --git a/doc/notebooks b/doc/notebooks
index 03d48f9f..dd5eeb54 160000
--- a/doc/notebooks
+++ b/doc/notebooks
@@ -1 +1 @@
-Subproject commit 03d48f9f143edb54dcb9c3f8331a247a0f59189d
+Subproject commit dd5eeb54244bbe2b7e4120083f068f7e5ccdcabb
diff --git a/pyproject.toml b/pyproject.toml
index 9737e6c0..bceb176e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,8 @@ test = [
   "nox",
   "pytest",
   "pytest-cov",
+  "scikit-build-core",
+  "nbval"
   "scikit-build-core"
 ]
 dev = [
@@ -44,6 +46,7 @@ dev = [
   "pytest-cov",
   "scikit-build-core",
   "pre-commit",
+  "nbval"
 ]
 docs = [
   "Sphinx",
diff --git a/src/tyssue/core/objects.py b/src/tyssue/core/objects.py
index 7bce26f1..ac07db0a 100644
--- a/src/tyssue/core/objects.py
+++ b/src/tyssue/core/objects.py
@@ -671,7 +671,7 @@ def validate(self):
 
         e.g. has only closed polygons and polyhedra
         """
-        return np.alltrue(self.get_valid())
+        return np.all(self.get_valid())
 
     def get_valid(self):
         """Set the 'is_valid' column to true if the faces are all closed polygons,