diff --git a/.ruff-excludes.toml b/.ruff-excludes.toml
index e12e0bc822f..e215a5b0db6 100644
--- a/.ruff-excludes.toml
+++ b/.ruff-excludes.toml
@@ -436,7 +436,6 @@
     "UP035",    # https://docs.astral.sh/ruff/rules/deprecated-import
 ]
 "./scripts/dts/python-devicetree/src/devicetree/dtlib.py" = [
-    "SIM201",   # https://docs.astral.sh/ruff/rules/negate-equal-op
     "UP007",    # https://docs.astral.sh/ruff/rules/non-pep604-annotation
 ]
 "./scripts/dts/python-devicetree/src/devicetree/edtlib.py" = [
diff --git a/scripts/dts/python-devicetree/src/devicetree/dtlib.py b/scripts/dts/python-devicetree/src/devicetree/dtlib.py
index 85605d44a87..38f74f338d2 100644
--- a/scripts/dts/python-devicetree/src/devicetree/dtlib.py
+++ b/scripts/dts/python-devicetree/src/devicetree/dtlib.py
@@ -110,7 +110,7 @@ class Node:
 
         if name.count("@") > 1:
             dt._parse_error("multiple '@' in node name")
-        if not name == "/":
+        if name != "/":
             for char in name:
                 if char not in _nodename_chars:
                     dt._parse_error(f"{self.path}: bad character '{char}' "