diff --git a/utils/check_api_reference.py b/utils/check_api_reference.py
index 7a9549694..42672a617 100644
--- a/utils/check_api_reference.py
+++ b/utils/check_api_reference.py
@@ -121,6 +121,72 @@
     print(extra)  # noqa: T201
     ret = 1
 
+# Series.cat methods
+series_cat_methods = [
+    i
+    for i in nw.from_native(pl.Series(), series_only=True).cat.__dir__()
+    if not i[0].isupper() and i[0] != "_"
+]
+with open("docs/api-reference/series_cat.md") as fd:
+    content = fd.read()
+documented = [
+    remove_prefix(i, "        - ")
+    for i in content.splitlines()
+    if i.startswith("        - ") and not i.startswith("        - _")
+]
+if missing := set(series_cat_methods).difference(documented):
+    print("Series.cat: not documented")  # noqa: T201
+    print(missing)  # noqa: T201
+    ret = 1
+if extra := set(documented).difference(series_cat_methods):
+    print("Series.cat: outdated")  # noqa: T201
+    print(extra)  # noqa: T201
+    ret = 1
+
+# Series.dt methods
+series_dt_methods = [
+    i
+    for i in nw.from_native(pl.Series(), series_only=True).dt.__dir__()
+    if not i[0].isupper() and i[0] != "_"
+]
+with open("docs/api-reference/series_dt.md") as fd:
+    content = fd.read()
+documented = [
+    remove_prefix(i, "        - ")
+    for i in content.splitlines()
+    if i.startswith("        - ") and not i.startswith("        - _")
+]
+if missing := set(series_dt_methods).difference(documented):
+    print("Series.dt: not documented")  # noqa: T201
+    print(missing)  # noqa: T201
+    ret = 1
+if extra := set(documented).difference(series_dt_methods):
+    print("Series.dt: outdated")  # noqa: T201
+    print(extra)  # noqa: T201
+    ret = 1
+
+# Series.str methods
+series_str_methods = [
+    i
+    for i in nw.from_native(pl.Series(), series_only=True).str.__dir__()
+    if not i[0].isupper() and i[0] != "_"
+]
+with open("docs/api-reference/series_str.md") as fd:
+    content = fd.read()
+documented = [
+    remove_prefix(i, "        - ")
+    for i in content.splitlines()
+    if i.startswith("        - ") and not i.startswith("        - _")
+]
+if missing := set(series_str_methods).difference(documented):
+    print("Series.str: not documented")  # noqa: T201
+    print(missing)  # noqa: T201
+    ret = 1
+if extra := set(documented).difference(series_str_methods):
+    print("Series.str: outdated")  # noqa: T201
+    print(extra)  # noqa: T201
+    ret = 1
+
 # Expr methods
 expr_methods = [
     i for i in nw.Expr(lambda: 0).__dir__() if not i[0].isupper() and i[0] != "_"
@@ -236,77 +302,11 @@
     print("Dtype: not documented")  # noqa: T201
     print(missing)  # noqa: T201
     ret = 1
-if extra := set(documented).difference(dtypes).difference(BASE_DTYPES):
+if extra := set(documented).difference(dtypes):
     print("Dtype: outdated")  # noqa: T201
     print(extra)  # noqa: T201
     ret = 1
 
-# Series.cat methods
-series_cat_methods = [
-    i
-    for i in nw.from_native(pl.Series(), series_only=True).cat.__dir__()
-    if not i[0].isupper() and i[0] != "_"
-]
-with open("docs/api-reference/series_cat.md") as fd:
-    content = fd.read()
-documented = [
-    remove_prefix(i, "        - ")
-    for i in content.splitlines()
-    if i.startswith("        - ") and not i.startswith("        - _")
-]
-if missing := set(series_cat_methods).difference(documented):
-    print("Series.cat: not documented")  # noqa: T201
-    print(missing)  # noqa: T201
-    ret = 1
-if extra := set(documented).difference(series_cat_methods):
-    print("Series.cat: outdated")  # noqa: T201
-    print(extra)  # noqa: T201
-    ret = 1
-
-# Series.dt methods
-series_dt_methods = [
-    i
-    for i in nw.from_native(pl.Series(), series_only=True).dt.__dir__()
-    if not i[0].isupper() and i[0] != "_"
-]
-with open("docs/api-reference/series_dt.md") as fd:
-    content = fd.read()
-documented = [
-    remove_prefix(i, "        - ")
-    for i in content.splitlines()
-    if i.startswith("        - ") and not i.startswith("        - _")
-]
-if missing := set(series_dt_methods).difference(documented):
-    print("Series.dt: not documented")  # noqa: T201
-    print(missing)  # noqa: T201
-    ret = 1
-if extra := set(documented).difference(series_dt_methods):
-    print("Series.dt: outdated")  # noqa: T201
-    print(extra)  # noqa: T201
-    ret = 1
-
-# Series.str methods
-series_str_methods = [
-    i
-    for i in nw.from_native(pl.Series(), series_only=True).str.__dir__()
-    if not i[0].isupper() and i[0] != "_"
-]
-with open("docs/api-reference/series_str.md") as fd:
-    content = fd.read()
-documented = [
-    remove_prefix(i, "        - ")
-    for i in content.splitlines()
-    if i.startswith("        - ") and not i.startswith("        - _")
-]
-if missing := set(series_str_methods).difference(documented):
-    print("Series.str: not documented")  # noqa: T201
-    print(missing)  # noqa: T201
-    ret = 1
-if extra := set(documented).difference(series_str_methods):
-    print("Series.str: outdated")  # noqa: T201
-    print(extra)  # noqa: T201
-    ret = 1
-
 # Check Expr vs Series
 expr = [i for i in nw.Expr(lambda: 0).__dir__() if not i[0].isupper() and i[0] != "_"]
 series = [