diff --git a/src/libsysprof-gtk/tests/test-charts.c b/src/libsysprof-gtk/tests/test-charts.c
index 64ffcbca..0f05a220 100644
--- a/src/libsysprof-gtk/tests/test-charts.c
+++ b/src/libsysprof-gtk/tests/test-charts.c
@@ -201,6 +201,7 @@ test_charts_class_init (TestChartsClass *klass)
   g_type_ensure (SYSPROF_TYPE_CHART);
   g_type_ensure (SYSPROF_TYPE_CHART_LAYER);
   g_type_ensure (SYSPROF_TYPE_COLUMN_LAYER);
+  g_type_ensure (SYSPROF_TYPE_LINE_LAYER);
   g_type_ensure (SYSPROF_TYPE_VALUE_AXIS);
 }
 
diff --git a/src/libsysprof-gtk/tests/test-charts.ui b/src/libsysprof-gtk/tests/test-charts.ui
index e7be3695..750a0ca6 100644
--- a/src/libsysprof-gtk/tests/test-charts.ui
+++ b/src/libsysprof-gtk/tests/test-charts.ui
@@ -2,56 +2,135 @@
 <interface>
   <template class="TestCharts" parent="GtkWindow">
     <child>
-      <object class="GtkScrolledWindow">
-        <property name="hscrollbar-policy">never</property>
-        <child>
-          <object class="GtkListBox">
+      <object class="GtkPaned">
+        <property name="position">200</property>
+        <child type="start">
+          <object class="GtkScrolledWindow">
+            <property name="hscrollbar-policy">never</property>
             <child>
-              <object class="SysprofChart">
-                <property name="height-request">128</property>
+              <object class="GtkListBox">
                 <child>
-                  <object class="SysprofColumnLayer">
-                    <binding name="x-axis">
-                      <lookup name="selected-time-axis" type="SysprofSession">
-                        <lookup name="session">TestCharts</lookup>
-                      </lookup>
-                    </binding>
-                    <property name="y-axis">
-                      <object class="SysprofValueAxis">
-                        <property name="min-value">0</property>
-                        <property name="max-value">128</property>
-                      </object>
-                    </property>
-                    <property name="series">
-                      <object class="SysprofXYSeries">
-                        <property name="model">
-                          <object class="GtkFilterListModel">
-                            <binding name="filter">
-                              <lookup name="filter" type="SysprofSession">
-                                <lookup name="session">TestCharts</lookup>
-                              </lookup>
-                            </binding>
-                            <binding name="model">
-                              <lookup name="samples" type="SysprofDocument">
-                                <lookup name="document">TestCharts</lookup>
-                              </lookup>
-                            </binding>
+                  <object class="SysprofChart">
+                    <property name="height-request">128</property>
+                    <child>
+                      <object class="SysprofColumnLayer">
+                        <binding name="x-axis">
+                          <lookup name="selected-time-axis" type="SysprofSession">
+                            <lookup name="session">TestCharts</lookup>
+                          </lookup>
+                        </binding>
+                        <property name="y-axis">
+                          <object class="SysprofValueAxis">
+                            <property name="min-value">0</property>
+                            <property name="max-value">128</property>
                           </object>
                         </property>
-                        <property name="x-expression">
-                          <lookup name="time" type="SysprofDocumentFrame"/>
-                        </property>
-                        <property name="y-expression">
-                          <lookup name="stack-depth" type="SysprofDocumentTraceable"/>
+                        <property name="series">
+                          <object class="SysprofXYSeries">
+                            <property name="model">
+                              <object class="GtkFilterListModel">
+                                <binding name="filter">
+                                  <lookup name="filter" type="SysprofSession">
+                                    <lookup name="session">TestCharts</lookup>
+                                  </lookup>
+                                </binding>
+                                <binding name="model">
+                                  <lookup name="samples" type="SysprofDocument">
+                                    <lookup name="document">TestCharts</lookup>
+                                  </lookup>
+                                </binding>
+                              </object>
+                            </property>
+                            <property name="x-expression">
+                              <lookup name="time" type="SysprofDocumentFrame"/>
+                            </property>
+                            <property name="y-expression">
+                              <lookup name="stack-depth" type="SysprofDocumentTraceable"/>
+                            </property>
+                          </object>
                         </property>
                       </object>
-                    </property>
+                    </child>
                   </object>
                 </child>
               </object>
             </child>
           </object>
         </child>
+        <child type="end">
+          <object class="GtkScrolledWindow">
+            <property name="hscrollbar-policy">never</property>
+            <child>
+              <object class="GtkListView">
+                <property name="show-separators">true</property>
+                <style>
+                  <class name="data-table"/>
+                </style>
+                <property name="model">
+                  <object class="GtkNoSelection">
+                    <binding name="model">
+                      <lookup name="counters" type="SysprofDocument">
+                        <lookup name="document">TestCharts</lookup>
+                      </lookup>
+                    </binding>
+                  </object>
+                </property>
+                <property name="factory">
+                  <object class="GtkBuilderListItemFactory">
+                    <property name="bytes"><![CDATA[
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <template class="GtkListItem">
+    <property name="child">
+      <object class="GtkBox">
+        <child>
+          <object class="GtkInscription">
+            <property name="xalign">1</property>
+            <property name="nat-chars">35</property>
+            <property name="min-chars">35</property>
+            <property name="margin-end">8</property>
+            <property name="text-overflow">clip</property>
+            <binding name="text">
+              <lookup name="name" type="SysprofDocumentCounter">
+                <lookup name="item">GtkListItem</lookup>
+              </lookup>
+            </binding>
+          </object>
+        </child>
+        <child>
+          <object class="SysprofChart">
+            <property name="hexpand">true</property>
+            <child>
+              <object class="SysprofLineLayer">
+                <property name="series">
+                  <object class="SysprofXYSeries">
+                    <binding name="model">
+                      <lookup name="item">GtkListItem</lookup>
+                    </binding>
+                    <property name="x-expression">
+                      <lookup name="time" type="SysprofDocumentFrame"/>
+                    </property>
+                    <property name="y-expression">
+                      <lookup name="time" type="SysprofDocumentFrame"/>
+                    </property>
+                  </object>
+                </property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </property>
+  </template>
+</interface>
+]]>
+                    </property>
+                  </object>
+                </property>
+              </object>
+            </child>
+          </object>
+        </child>
       </object>
     </child>
   </template>