diff --git a/environment.yaml b/environment.yaml
index 372520e..46245c5 100644
--- a/environment.yaml
+++ b/environment.yaml
@@ -10,7 +10,7 @@ dependencies:
   - des-pizza-cutter-metadetect
   - esutil
   - fitsio
-  - galsim
+  - galsim<2.5
   - importlib_metadata
   - joblib
   - lsstdesc-coord
@@ -31,6 +31,11 @@ dependencies:
   - galsim>=2.3
   - treegp>=0.6
   - threadpoolctl>=3.1
+  - nose
+  - coverage
+  - pytest<8
+  - nbval
+  - ipykernel
   # host setup.py
   - pip
   - setuptools_scm