diff --git a/tests/examples_arguments_syntax/cumulative_count_chart.py b/tests/examples_arguments_syntax/cumulative_count_chart.py
index f6e1df075..6ee7ad277 100644
--- a/tests/examples_arguments_syntax/cumulative_count_chart.py
+++ b/tests/examples_arguments_syntax/cumulative_count_chart.py
@@ -17,5 +17,5 @@
     sort=[{"field": "IMDB_Rating"}],
 ).mark_area().encode(
     x="IMDB_Rating:Q",
-    y="cumulative_count:Q"
+    y=alt.Y("cumulative_count:Q", stack=False)
 )
diff --git a/tests/examples_methods_syntax/cumulative_count_chart.py b/tests/examples_methods_syntax/cumulative_count_chart.py
new file mode 100644
index 000000000..a9b08361c
--- /dev/null
+++ b/tests/examples_methods_syntax/cumulative_count_chart.py
@@ -0,0 +1,21 @@
+"""
+Cumulative Count Chart
+----------------------
+This example shows an area chart with cumulative count.
+Adapted from https://vega.github.io/vega-lite/examples/area_cumulative_freq.html
+
+"""
+# category: distributions
+
+import altair as alt
+from vega_datasets import data
+
+source = data.movies.url
+
+alt.Chart(source).transform_window(
+    cumulative_count="count()",
+    sort=[{"field": "IMDB_Rating"}],
+).mark_area().encode(
+    x="IMDB_Rating:Q",
+    y=alt.Y("cumulative_count:Q").stack(False)
+)