diff --git a/pyproject.toml b/pyproject.toml
index 59c9352b..eec5a3e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -116,6 +116,7 @@ select = [
     "NPY", # Numpy linting
     "N", # PEP8 naming
 #    "D", # Docstring checks these may need to be added gradually
+    "ERA001", # Commented out code!
 ]
 
 ignore = [
diff --git a/ruff-increased-checking.toml b/ruff-increased-checking.toml
index 37dbd749..d15911dc 100644
--- a/ruff-increased-checking.toml
+++ b/ruff-increased-checking.toml
@@ -32,6 +32,7 @@ select = [
     "NPY", # Numpy linting
     "N", # PEP8 naming
     "D", # Docstring checks these may need to be added gradually
+    "ERA001", # Commented out code!
 ]
 
 # Line length is set to 88 for ruff. This is what the formatter aims for