diff --git a/python/plugins/processing/tests/models/filtertest.model3 b/python/plugins/processing/tests/models/filtertest.model3
index bc283bc2ed4..1f8924d4c16 100644
--- a/python/plugins/processing/tests/models/filtertest.model3
+++ b/python/plugins/processing/tests/models/filtertest.model3
@@ -1,102 +1,80 @@
 <!DOCTYPE model>
 <Option type="Map">
-  <Option type="Map" name="children">
-    <Option type="Map" name="native:filter_1">
-      <Option value="true" type="bool" name="active"/>
-      <Option type="Map" name="alg_config">
-        <Option type="List" name="outputs">
+  <Option name="children" type="Map">
+    <Option name="native:filter_1" type="Map">
+      <Option name="active" value="true" type="bool"/>
+      <Option name="alg_config" type="Map">
+        <Option name="outputs" type="List">
           <Option type="Map">
-            <Option value="1" type="QString" name="expression"/>
-            <Option value="true" type="bool" name="isModelOutput"/>
-            <Option value="all" type="QString" name="name"/>
+            <Option name="expression" value="&quot;id2&quot; &lt; 1" type="QString"/>
+            <Option name="isModelOutput" value="true" type="bool"/>
+            <Option name="name" value="small" type="QString"/>
           </Option>
           <Option type="Map">
-            <Option value="0" type="QString" name="expression"/>
-            <Option value="true" type="bool" name="isModelOutput"/>
-            <Option value="nothing" type="QString" name="name"/>
+            <Option name="expression" value="&quot;id2&quot; >= 1" type="QString"/>
+            <Option name="isModelOutput" value="true" type="bool"/>
+            <Option name="name" value="big" type="QString"/>
           </Option>
         </Option>
       </Option>
-      <Option value="native:filter" type="QString" name="alg_id"/>
-      <Option value="Filter" type="QString" name="component_description"/>
-      <Option value="623" type="double" name="component_pos_x"/>
-      <Option value="347" type="double" name="component_pos_y"/>
+      <Option name="alg_id" value="native:filter" type="QString"/>
+      <Option name="component_description" value="Filter" type="QString"/>
+      <Option name="component_pos_x" value="623" type="double"/>
+      <Option name="component_pos_y" value="347" type="double"/>
       <Option name="dependencies"/>
-      <Option value="native:filter_1" type="QString" name="id"/>
-      <Option type="Map" name="outputs">
-        <Option type="Map" name="OUTPUT_all">
-          <Option value="native:filter_1" type="QString" name="child_id"/>
-          <Option value="OUTPUT_all" type="QString" name="component_description"/>
-          <Option value="823" type="double" name="component_pos_x"/>
-          <Option value="392" type="double" name="component_pos_y"/>
-          <Option value="OUTPUT_all" type="QString" name="name"/>
-          <Option value="OUTPUT_all" type="QString" name="output_name"/>
+      <Option name="id" value="native:filter_1" type="QString"/>
+      <Option name="outputs" type="Map">
+        <Option name="OUTPUT_big" type="Map">
+          <Option name="child_id" value="native:filter_1" type="QString"/>
+          <Option name="component_description" value="OUTPUT_big" type="QString"/>
+          <Option name="component_pos_x" value="823" type="double"/>
+          <Option name="component_pos_y" value="392" type="double"/>
+          <Option name="name" value="OUTPUT_big" type="QString"/>
+          <Option name="output_name" value="OUTPUT_big" type="QString"/>
         </Option>
-        <Option type="Map" name="OUTPUT_nothing">
-          <Option value="native:filter_1" type="QString" name="child_id"/>
-          <Option value="OUTPUT_nothing" type="QString" name="component_description"/>
-          <Option value="823" type="double" name="component_pos_x"/>
-          <Option value="422" type="double" name="component_pos_y"/>
-          <Option value="OUTPUT_nothing" type="QString" name="name"/>
-          <Option value="OUTPUT_nothing" type="QString" name="output_name"/>
+        <Option name="OUTPUT_small" type="Map">
+          <Option name="child_id" value="native:filter_1" type="QString"/>
+          <Option name="component_description" value="OUTPUT_small" type="QString"/>
+          <Option name="component_pos_x" value="823" type="double"/>
+          <Option name="component_pos_y" value="422" type="double"/>
+          <Option name="name" value="OUTPUT_small" type="QString"/>
+          <Option name="output_name" value="OUTPUT_small" type="QString"/>
         </Option>
       </Option>
-      <Option value="false" type="bool" name="outputs_collapsed"/>
-      <Option value="false" type="bool" name="parameters_collapsed"/>
-      <Option type="Map" name="params">
-        <Option type="List" name="INPUT">
+      <Option name="outputs_collapsed" value="false" type="bool"/>
+      <Option name="parameters_collapsed" value="false" type="bool"/>
+      <Option name="params" type="Map">
+        <Option name="INPUT" type="List">
           <Option type="Map">
-            <Option value="layer" type="QString" name="parameter_name"/>
-            <Option value="0" type="int" name="source"/>
+            <Option name="parameter_name" value="layer" type="QString"/>
+            <Option name="source" value="0" type="int"/>
           </Option>
         </Option>
       </Option>
     </Option>
   </Option>
   <Option name="help"/>
-  <Option value="filter" type="QString" name="model_group"/>
-  <Option value="filtertest" type="QString" name="model_name"/>
-  <Option type="Map" name="parameterDefinitions">
-    <Option type="Map" name="layer">
-      <Option type="List" name="data_types">
+  <Option name="model_group" value="filter" type="QString"/>
+  <Option name="model_name" value="filtertest" type="QString"/>
+  <Option name="parameterDefinitions" type="Map">
+    <Option name="layer" type="Map">
+      <Option name="data_types" type="List">
         <Option value="5" type="int"/>
       </Option>
-      <Option value="" type="Unknown" name="default"/>
-      <Option value="layer" type="QString" name="description"/>
-      <Option value="0" type="int" name="flags"/>
+      <Option name="default" value="" type="Unknown"/>
+      <Option name="description" value="layer" type="QString"/>
+      <Option name="flags" value="0" type="int"/>
       <Option name="metadata"/>
-      <Option value="layer" type="QString" name="name"/>
-      <Option value="vector" type="QString" name="parameter_type"/>
-    </Option>
-    <Option type="Map" name="native:filter_1:OUTPUT_all">
-      <Option value="true" type="bool" name="create_by_default"/>
-      <Option value="-1" type="int" name="data_type"/>
-      <Option value="" type="Unknown" name="default"/>
-      <Option value="OUTPUT_all" type="QString" name="description"/>
-      <Option value="20" type="int" name="flags"/>
-      <Option name="metadata"/>
-      <Option value="native:filter_1:OUTPUT_all" type="QString" name="name"/>
-      <Option value="sink" type="QString" name="parameter_type"/>
-      <Option value="true" type="bool" name="supports_non_file_outputs"/>
-    </Option>
-    <Option type="Map" name="native:filter_1:OUTPUT_nothing">
-      <Option value="true" type="bool" name="create_by_default"/>
-      <Option value="-1" type="int" name="data_type"/>
-      <Option value="" type="Unknown" name="default"/>
-      <Option value="OUTPUT_nothing" type="QString" name="description"/>
-      <Option value="20" type="int" name="flags"/>
-      <Option name="metadata"/>
-      <Option value="native:filter_1:OUTPUT_nothing" type="QString" name="name"/>
-      <Option value="sink" type="QString" name="parameter_type"/>
-      <Option value="true" type="bool" name="supports_non_file_outputs"/>
+      <Option name="name" value="layer" type="QString"/>
+      <Option name="parameter_type" value="vector" type="QString"/>
     </Option>
   </Option>
-  <Option type="Map" name="parameters">
-    <Option type="Map" name="layer">
-      <Option value="layer" type="QString" name="component_description"/>
-      <Option value="208" type="double" name="component_pos_x"/>
-      <Option value="291" type="double" name="component_pos_y"/>
-      <Option value="layer" type="QString" name="name"/>
+  <Option name="parameters" type="Map">
+    <Option name="layer" type="Map">
+      <Option name="component_description" value="layer" type="QString"/>
+      <Option name="component_pos_x" value="208" type="double"/>
+      <Option name="component_pos_y" value="291" type="double"/>
+      <Option name="name" value="layer" type="QString"/>
     </Option>
   </Option>
 </Option>
diff --git a/python/plugins/processing/tests/testdata/expected/filter_points_big.gml b/python/plugins/processing/tests/testdata/expected/filter_points_big.gml
new file mode 100644
index 00000000000..8b7a0ed81e4
--- /dev/null
+++ b/python/plugins/processing/tests/testdata/expected/filter_points_big.gml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ogr:FeatureCollection
+     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+     xsi:schemaLocation="http://ogr.maptools.org/ filter_points_big.xsd"
+     xmlns:ogr="http://ogr.maptools.org/"
+     xmlns:gml="http://www.opengis.net/gml">
+  <gml:boundedBy>
+    <gml:Box>
+      <gml:coord><gml:X>1</gml:X><gml:Y>1</gml:Y></gml:coord>
+      <gml:coord><gml:X>5</gml:X><gml:Y>3</gml:Y></gml:coord>
+    </gml:Box>
+  </gml:boundedBy>
+                                                                                                                                                                
+  <gml:featureMember>
+    <ogr:filter_points_big fid="points.0">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>1,1</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>1</ogr:id>
+      <ogr:id2>2</ogr:id2>
+    </ogr:filter_points_big>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_big fid="points.1">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>3,3</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>2</ogr:id>
+      <ogr:id2>1</ogr:id2>
+    </ogr:filter_points_big>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_big fid="points.3">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>5,2</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>4</ogr:id>
+      <ogr:id2>2</ogr:id2>
+    </ogr:filter_points_big>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_big fid="points.4">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>4,1</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>5</ogr:id>
+      <ogr:id2>1</ogr:id2>
+    </ogr:filter_points_big>
+  </gml:featureMember>
+</ogr:FeatureCollection>
diff --git a/python/plugins/processing/tests/testdata/expected/filter_points_small.gml b/python/plugins/processing/tests/testdata/expected/filter_points_small.gml
new file mode 100644
index 00000000000..1a9f934d95c
--- /dev/null
+++ b/python/plugins/processing/tests/testdata/expected/filter_points_small.gml
@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ogr:FeatureCollection
+     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+     xsi:schemaLocation="http://ogr.maptools.org/ filter_points_small.xsd"
+     xmlns:ogr="http://ogr.maptools.org/"
+     xmlns:gml="http://www.opengis.net/gml">
+  <gml:boundedBy>
+    <gml:Box>
+      <gml:coord><gml:X>0</gml:X><gml:Y>-5</gml:Y></gml:coord>
+      <gml:coord><gml:X>8</gml:X><gml:Y>2</gml:Y></gml:coord>
+    </gml:Box>
+  </gml:boundedBy>
+                                                                                                                                                               
+  <gml:featureMember>
+    <ogr:filter_points_small fid="points.2">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>2,2</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>3</ogr:id>
+      <ogr:id2>0</ogr:id2>
+    </ogr:filter_points_small>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_small fid="points.5">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-5</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>6</ogr:id>
+      <ogr:id2>0</ogr:id2>
+    </ogr:filter_points_small>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_small fid="points.6">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>8,-1</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>7</ogr:id>
+      <ogr:id2>0</ogr:id2>
+    </ogr:filter_points_small>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_small fid="points.7">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>7,-1</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>8</ogr:id>
+      <ogr:id2>0</ogr:id2>
+    </ogr:filter_points_small>
+  </gml:featureMember>
+  <gml:featureMember>
+    <ogr:filter_points_small fid="points.8">
+      <ogr:geometryProperty><gml:Point srsName="EPSG:4326"><gml:coordinates>0,-1</gml:coordinates></gml:Point></ogr:geometryProperty>
+      <ogr:id>9</ogr:id>
+      <ogr:id2>0</ogr:id2>
+    </ogr:filter_points_small>
+  </gml:featureMember>
+</ogr:FeatureCollection>
diff --git a/python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml b/python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml
index 56c94c859f3..ad2baaf81fa 100644
--- a/python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml
+++ b/python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml
@@ -5176,3 +5176,19 @@ tests:
       OUTPUT:
         name: expected/swap_xy.gml
         type: vector
+
+  - algorithm: model:filtertest
+    name: Test (model:filtertest)
+    params:
+      layer:
+        name: points.gml
+        type: vector
+    results:
+      native:filter_1:OUTPUT_small:
+        name: expected/filter_points_small.gml
+        type: vector
+      native:filter_1:OUTPUT_big:
+        name: expected/filter_points_big.gml
+        type: vector
+
+# See ../README.md for a description of the file format