Try testing against a branch that includes a hack to avoid the latest numpy that won't build on sbfrtfops.

Author: jehturner

tox.ini

@@ -62,8 +62,7 @@ extras =
     test
     docs: docs
 deps =
-    numpy==2.3.0
-    git+https://github.com/jehturner/astropy.git@issue_18384
+    git+https://github.com/jehturner/astropy.git@issue_18384_dragons
     git+https://github.com/GeminiDRSoftware/FitsStorage.git@v3.4.0
     git+https://github.com/GeminiDRSoftware/pytest_dragons.git@v1.0.5#egg=pytest_dragons
 changedir =