diff --git a/tests/examples_arguments_syntax/ranged_dot_plot.py b/tests/examples_arguments_syntax/ranged_dot_plot.py
index d7efcf77c..2ca244eb4 100644
--- a/tests/examples_arguments_syntax/ranged_dot_plot.py
+++ b/tests/examples_arguments_syntax/ranged_dot_plot.py
@@ -9,35 +9,32 @@
 
 source = data.countries.url
 
-chart = alt.Chart(
-    data=source
-).transform_filter(
-    filter={"field": 'country',
-            "oneOf": ["China", "India", "United States", "Indonesia", "Brazil"]}
-).transform_filter(
-    filter={'field': 'year',
-            "oneOf": [1955, 2000]}
+chart = (
+    alt.Chart(source)
+    .encode(x="life_expect:Q", y="country:N")
+    .transform_filter(
+        alt.FieldOneOfPredicate(
+            field="country",
+            oneOf=["China", "India", "United States", "Indonesia", "Brazil"],
+        )
+    )
+    .transform_filter(alt.FieldOneOfPredicate(field="year", oneOf=[1955, 2000]))
 )
 
-line = chart.mark_line(color='#db646f').encode(
-    x='life_expect:Q',
-    y='country:N',
-    detail='country:N'
-)
+line = chart.mark_line(color="#db646f").encode(detail="country:N")
+
 # Add points for life expectancy in 1955 & 2000
-points = chart.mark_point(
-    size=100,
-    opacity=1,
-    filled=True
-).encode(
-    x='life_expect:Q',
-    y='country:N',
-    color=alt.Color('year:O',
-        scale=alt.Scale(
-            domain=[1955, 2000],
-            range=['#e6959c', '#911a24']
-        )
+color = alt.Color(
+    "year:O", scale=alt.Scale(domain=[1955, 2000], range=["#e6959c", "#911a24"])
+)
+points = (
+    chart.mark_point(
+        size=100,
+        opacity=1,
+        filled=True,
     )
-).interactive()
+    .encode(color=color)
+    .interactive()
+)
 
 (line + points)
diff --git a/tests/examples_methods_syntax/ranged_dot_plot.py b/tests/examples_methods_syntax/ranged_dot_plot.py
index 340eeed32..d2649c7ec 100644
--- a/tests/examples_methods_syntax/ranged_dot_plot.py
+++ b/tests/examples_methods_syntax/ranged_dot_plot.py
@@ -9,30 +9,30 @@
 
 source = data.countries.url
 
-chart = alt.Chart(
-    data=source
-).transform_filter(
-    filter={"field": 'country',
-            "oneOf": ["China", "India", "United States", "Indonesia", "Brazil"]}
-).transform_filter(
-    filter={'field': 'year',
-            "oneOf": [1955, 2000]}
+chart = (
+    alt.Chart(source)
+    .encode(x="life_expect:Q", y="country:N")
+    .transform_filter(
+        alt.FieldOneOfPredicate(
+            field="country",
+            oneOf=["China", "India", "United States", "Indonesia", "Brazil"],
+        )
+    )
+    .transform_filter(alt.FieldOneOfPredicate(field="year", oneOf=[1955, 2000]))
 )
 
-line = chart.mark_line(color='#db646f').encode(
-    x='life_expect:Q',
-    y='country:N',
-    detail='country:N'
-)
+line = chart.mark_line(color="#db646f").encode(detail="country:N")
+
 # Add points for life expectancy in 1955 & 2000
-points = chart.mark_point(
-    size=100,
-    opacity=1,
-    filled=True
-).encode(
-    x='life_expect:Q',
-    y='country:N',
-    color=alt.Color('year:O').scale(domain=[1955, 2000], range=['#e6959c', '#911a24'])
-).interactive()
+color = alt.Color("year:O").scale(domain=[1955, 2000], range=["#e6959c", "#911a24"])
+points = (
+    chart.mark_point(
+        size=100,
+        opacity=1,
+        filled=True,
+    )
+    .encode(color=color)
+    .interactive()
+)
 
 (line + points)