diff --git a/loopy/transform/diff.py b/loopy/transform/diff.py
index c29a1895aa92511c02a1fd930c5c275e4811a983..f2ddc4688e5a8ba13288234bef9d43b596d6afab 100644
--- a/loopy/transform/diff.py
+++ b/loopy/transform/diff.py
@@ -390,8 +390,8 @@ def diff_kernel(kernel, diff_outputs, by, diff_iname_prefix="diff_i",
 
     if isinstance(diff_outputs, str):
         diff_outputs = [
-                dout.strip() for dout in diff_outputs.split(",")
-                if dout.strip()]
+                d_out.strip() for d_out in diff_outputs.split(",")
+                if d_out.strip()]
 
     by_arg = kernel.arg_dict[by]
     additional_shape = by_arg.shape
@@ -405,8 +405,8 @@ def diff_kernel(kernel, diff_outputs, by, diff_iname_prefix="diff_i",
             additional_shape=additional_shape)
 
     result = {}
-    for dout in diff_outputs:
-        result = diff_context.get_diff_var(dout)
+    for d_out in diff_outputs:
+        result = diff_context.get_diff_var(d_out)
 
     for cout in copy_outputs:
         diff_context.import_output_var(cout)
diff --git a/pyproject.toml b/pyproject.toml
index 6d0d765b85dc863b6ed19ab2a55db04594da617b..077cf126f241de7cc417909fbccbee0833c78a47 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -190,8 +190,6 @@ extend-ignore-re = [
 arange = "arange"
 # N-Dimensional
 ND = "ND"
-# used for 'diff_output'
-dout = "dout"
 # an element-wise slice of array u
 ue = "ue"
 # used in an ordering context, "ab" / "ba"
@@ -199,8 +197,6 @@ ba = "ba"
 # Fortran Loopy
 floopy = "floopy"
 
-"dependees" = "dependees"
-
 [tool.typos.files]
 extend-exclude = [
   "loopy/target/c/compyte",