diff --git a/tests/ci/build_scenario.sh b/tests/ci/build_scenario.sh
index 478706a4..4a982f07 100755
--- a/tests/ci/build_scenario.sh
+++ b/tests/ci/build_scenario.sh
@@ -10,4 +10,4 @@
 #   (run from top level directory!)
 #===============================================================================
 
-apptainer exec "$1" python -m doom_creator.compile_scenario gathering apples
\ No newline at end of file
+singularity exec "$1" python -m doom_creator.compile_scenario gathering apples
diff --git a/tests/ci/lint.sh b/tests/ci/lint.sh
index eb916385..093f3a8e 100755
--- a/tests/ci/lint.sh
+++ b/tests/ci/lint.sh
@@ -43,9 +43,9 @@ fi
 
 if [ -n "$changed_files" ]; then
     # Format
-    apptainer exec "$CONTAINER" ruff format $changed_files $check
+    singularity exec "$CONTAINER" ruff format $changed_files $check
     # Run ruff on changed files with any remaining arguments
-    apptainer exec "$CONTAINER" ruff check $changed_files "$@"
+    singularity exec "$CONTAINER" ruff check $changed_files "$@"
 else
     echo "No .py files changed"
 fi
diff --git a/tests/ci/scan_configs.sh b/tests/ci/scan_configs.sh
index 2d08c588..e36aec54 100755
--- a/tests/ci/scan_configs.sh
+++ b/tests/ci/scan_configs.sh
@@ -17,6 +17,6 @@
 
 for file in config/user/experiment/*.yaml; do
     experiment=$(basename "$file" .yaml)
-    apptainer exec "$1" \
+    singularity exec "$1" \
     python main.py +experiment="$experiment" command=scan system.device=cpu
 done
\ No newline at end of file