diff --git a/.github/workflows/validate-docs.yml b/.github/workflows/validate-docs.yml
index 4227693..09c29b3 100644
--- a/.github/workflows/validate-docs.yml
+++ b/.github/workflows/validate-docs.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v6
       - name: Validate source
-        run: make test
+        run: make lint
       - name: Build html
         run: make html
       - name: List built files
diff --git a/Makefile b/Makefile
index dc21a39..2a56ba9 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@ lint: $(VIRTUALENV)
 	doc8 --ignore-path $< --ignore-path "$(BUILDDIR)" --max-line-length 120 .
 
 # Workaround sphinx-doc/sphinx#4371.
-spelling: SPHINXOPTS += -E
+spelling: SPHINXOPTS += -E -W
 
 # clean up
 clean:
diff --git a/dict.txt b/dict.txt
index 7e4ae69..43c516e 100644
--- a/dict.txt
+++ b/dict.txt
@@ -327,6 +327,7 @@ cyber
 cybersecurity
 cyclocross
 Daemen
+dahl
 DARPA
 datacenter
 datacenter's
@@ -1232,6 +1233,7 @@ Ott
 OTT
 Ousterhoust
 Ousterhout
+outsized
 overcommit
 overfit
 overfitting