diff --git a/tests/examples_arguments_syntax/bar_chart_with_single_threshold.py b/tests/examples_arguments_syntax/bar_chart_with_single_threshold.py
new file mode 100644
index 000000000..1a626261a
--- /dev/null
+++ b/tests/examples_arguments_syntax/bar_chart_with_single_threshold.py
@@ -0,0 +1,39 @@
+"""
+Bar Chart Highlighting Values beyond a Threshold
+------------------------------------------------
+This example shows a bar chart highlighting values beyond a threshold.
+"""
+# category: bar charts
+import pandas as pd
+import altair as alt
+
+source = pd.DataFrame({
+    'Day': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], 
+    'Value': [55, 112, 65, 38, 80, 138, 120, 103, 395, 200, 72, 51, 112, 175, 131]
+})
+threshold = 300
+
+bars = alt.Chart(source).mark_bar(color="steelblue").encode(
+    x="Day:O",
+    y='Value:Q',
+)
+
+highlight = bars.mark_bar(color='#e45755').encode(
+    y2=alt.Y2(datum=threshold)
+).transform_filter(
+    alt.datum.Value > threshold
+)
+
+rule = alt.Chart().mark_rule().encode(
+    y=alt.Y(datum=threshold)
+)
+
+label = rule.mark_text(
+    x='width',
+    dx=-2,
+    align="right",
+    baseline='bottom',
+    text='hazardous'
+)
+
+(bars + highlight + rule + label)
\ No newline at end of file
diff --git a/tests/examples_methods_syntax/bar_chart_with_single_threshold.py b/tests/examples_methods_syntax/bar_chart_with_single_threshold.py
new file mode 100644
index 000000000..1a626261a
--- /dev/null
+++ b/tests/examples_methods_syntax/bar_chart_with_single_threshold.py
@@ -0,0 +1,39 @@
+"""
+Bar Chart Highlighting Values beyond a Threshold
+------------------------------------------------
+This example shows a bar chart highlighting values beyond a threshold.
+"""
+# category: bar charts
+import pandas as pd
+import altair as alt
+
+source = pd.DataFrame({
+    'Day': [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], 
+    'Value': [55, 112, 65, 38, 80, 138, 120, 103, 395, 200, 72, 51, 112, 175, 131]
+})
+threshold = 300
+
+bars = alt.Chart(source).mark_bar(color="steelblue").encode(
+    x="Day:O",
+    y='Value:Q',
+)
+
+highlight = bars.mark_bar(color='#e45755').encode(
+    y2=alt.Y2(datum=threshold)
+).transform_filter(
+    alt.datum.Value > threshold
+)
+
+rule = alt.Chart().mark_rule().encode(
+    y=alt.Y(datum=threshold)
+)
+
+label = rule.mark_text(
+    x='width',
+    dx=-2,
+    align="right",
+    baseline='bottom',
+    text='hazardous'
+)
+
+(bars + highlight + rule + label)
\ No newline at end of file