diff --git a/.github/workflows/check_tpch_queries.yml b/.github/workflows/check_tpch_queries.yml
index 619587eae..94cf101d5 100644
--- a/.github/workflows/check_tpch_queries.yml
+++ b/.github/workflows/check_tpch_queries.yml
@@ -27,4 +27,4 @@ jobs:
       - name: generate-data
         run: cd tpch && python generate_data.py
       - name: tpch-tests 
-        run: cd tpch #&& pytest tests
+        run: cd tpch && pytest tests
diff --git a/README.md b/README.md
index 74630fd03..29623920a 100644
--- a/README.md
+++ b/README.md
@@ -95,9 +95,6 @@ See the [tutorial](https://narwhals-dev.github.io/narwhals/basics/dataframe/) fo
 
 If you said yes to both, we'd love to hear from you!
 
-**Note**: You might suspect that this is a secret ploy to infiltrate the Polars API everywhere.
-Indeed, you may suspect that.
-
 ## Sponsors and institutional partners
 
 Narwhals is 100% independent, community-driven, and community-owned.
diff --git a/tpch/generate_data.py b/tpch/generate_data.py
index 4d5695dcf..5fd73b1f7 100644
--- a/tpch/generate_data.py
+++ b/tpch/generate_data.py
@@ -10,7 +10,7 @@
 
 con = duckdb.connect(database=":memory:")
 con.execute("INSTALL tpch; LOAD tpch")
-con.execute("CALL dbgen(sf=1)")
+con.execute("CALL dbgen(sf=.5)")
 tables = [
     "lineitem",
     "customer",
diff --git a/utils/check_api_reference.py b/utils/check_api_reference.py
index ec599def5..1bf1f086e 100644
--- a/utils/check_api_reference.py
+++ b/utils/check_api_reference.py
@@ -9,15 +9,30 @@
 
 ret = 0
 
+NAMESPACES = {"dt", "str", "cat", "name"}
+EXPR_ONLY_METHODS = {"over"}
+SERIES_ONLY_METHODS = {
+    "to_arrow",
+    "to_dummies",
+    "to_pandas",
+    "to_list",
+    "to_numpy",
+    "dtype",
+    "name",
+    "shape",
+    "to_frame",
+    "is_empty",
+    "is_sorted",
+    "value_counts",
+    "zip_with",
+    "item",
+    "scatter",
+}
+
 # TODO(Unassigned): make dtypes reference page as well
 files = {remove_suffix(i, ".py") for i in os.listdir("narwhals")}
 top_level_functions = [
-    i
-    for i in nw.__dir__()
-    if not i[0].isupper()
-    and i[0] != "_"
-    and i not in files
-    and i not in {"annotations", "DataFrame", "LazyFrame", "Series"}
+    i for i in nw.__dir__() if not i[0].isupper() and i[0] != "_" and i not in files
 ]
 with open("docs/api-reference/narwhals.md") as fd:
     content = fd.read()
@@ -89,11 +104,7 @@
     for i in content.splitlines()
     if i.startswith("        - ") and not i.startswith("        - _")
 ]
-if (
-    missing := set(top_level_functions)
-    .difference(documented)
-    .difference({"dt", "str", "cat", "name"})
-):
+if missing := set(top_level_functions).difference(documented).difference(NAMESPACES):
     print("Series: not documented")  # noqa: T201
     print(missing)  # noqa: T201
     ret = 1
@@ -112,11 +123,7 @@
     for i in content.splitlines()
     if i.startswith("        - ")
 ]
-if (
-    missing := set(top_level_functions)
-    .difference(documented)
-    .difference({"cat", "str", "dt", "name"})
-):
+if missing := set(top_level_functions).difference(documented).difference(NAMESPACES):
     print("Expr: not documented")  # noqa: T201
     print(missing)  # noqa: T201
     ret = 1
@@ -139,33 +146,11 @@
     if not i[0].isupper() and i[0] != "_"
 ]
 
-if missing := set(expr).difference(series).difference({"over"}):
+if missing := set(expr).difference(series).difference(EXPR_ONLY_METHODS):
     print("In expr but not in series")  # noqa: T201
     print(missing)  # noqa: T201
     ret = 1
-if (
-    extra := set(series)
-    .difference(expr)
-    .difference(
-        {
-            "to_arrow",
-            "to_dummies",
-            "to_pandas",
-            "to_list",
-            "to_numpy",
-            "dtype",
-            "name",
-            "shape",
-            "to_frame",
-            "is_empty",
-            "is_sorted",
-            "value_counts",
-            "zip_with",
-            "item",
-            "scatter",
-        }
-    )
-):
+if extra := set(series).difference(expr).difference(SERIES_ONLY_METHODS):
     print("in series but not in expr")  # noqa: T201
     print(extra)  # noqa: T201
     ret = 1