diff --git a/.github/scripts/generate_yml_env_fixed_py.py b/.github/scripts/generate_yml_env_fixed_py.py
index 08922e3ca..b83cf40c1 100644
--- a/.github/scripts/generate_yml_env_fixed_py.py
+++ b/.github/scripts/generate_yml_env_fixed_py.py
@@ -23,7 +23,7 @@ def environment_yml_nopy(fn_env: str, py_version: str, add_deps: list[str] = Non
 
     # Optionally, add other dependencies
     if add_deps is not None:
-        conda_dep_env_forced_py.extend(add_deps)
+        conda_dep_env_forced_py.extend(add_deps.split(","))
 
     # Copy back to new yaml dict
     yaml_out = yaml_env.copy()
@@ -51,4 +51,4 @@ def environment_yml_nopy(fn_env: str, py_version: str, add_deps: list[str] = Non
         help="List of dependencies to add.",
     )
     args = parser.parse_args()
-    environment_yml_nopy(fn_env=args.fn_env, py_version=args.py_version, add_deps=args.add_deps.split(","))
+    environment_yml_nopy(fn_env=args.fn_env, py_version=args.py_version, add_deps=args.add_deps)
diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 2db71692a..8c49fcdf1 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -64,7 +64,7 @@ jobs:
         python .github/scripts/generate_yml_env_fixed_py.py --pyv ${{ matrix.python-version }} --add "gdal" "environment.yml"
         mamba env update -n geoutils-dev -f environment-ci-py${{ matrix.python-version }}.yml
 
-    # If/else equivalent to install base environment, or base+optionnal
+    # If/else equivalent to install base environment, or base+optional
     - name: Install project environment (base)
       if: ${{ matrix.dep-level == 'base' }}
       run: pip install -e .[test]