--- a/src/eric7/Testing/TestingWidget.ui	Sun Dec 31 14:11:11 2023 +0100
+++ b/src/eric7/Testing/TestingWidget.ui	Sun Dec 31 14:57:43 2023 +0100
@@ -50,6 +50,9 @@
            <property name="whatsThis">
             <string>&lt;b&gt;Virtual Environment&lt;/b&gt;\n&lt;p&gt;Enter the virtual environment to be used. Leave it empty to use the default environment, i.e. the one configured globally or per project.&lt;/p&gt;</string>
            </property>
+           <property name="insertPolicy">
+            <enum>QComboBox::NoInsert</enum>
+           </property>
           </widget>
          </item>
          <item row="1" column="0">
@@ -70,6 +73,9 @@
            <property name="toolTip">
             <string>Select the test framwork to be used</string>
            </property>
+           <property name="insertPolicy">
+            <enum>QComboBox::NoInsert</enum>
+           </property>
           </widget>
          </item>
          <item row="1" column="2">