diff --git a/tests/reference/gui/0_nwProject.nwx b/tests/reference/gui/0_nwProject.nwx
index c3337adb..e5368533 100644
--- a/tests/reference/gui/0_nwProject.nwx
+++ b/tests/reference/gui/0_nwProject.nwx
@@ -7,6 +7,7 @@
   </project>
   <settings>
     <spellCheck>False</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>None</lastEdited>
     <lastViewed>None</lastViewed>
     <lastWordCount>0</lastWordCount>
diff --git a/tests/reference/gui/1_nwProject.nwx b/tests/reference/gui/1_nwProject.nwx
index 193087e6..02119a65 100644
--- a/tests/reference/gui/1_nwProject.nwx
+++ b/tests/reference/gui/1_nwProject.nwx
@@ -7,6 +7,7 @@
   </project>
   <settings>
     <spellCheck>True</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>31489056e0916</lastEdited>
     <lastViewed>31489056e0916</lastViewed>
     <lastWordCount>86</lastWordCount>
diff --git a/tests/reference/gui/2_nwProject.nwx b/tests/reference/gui/2_nwProject.nwx
index 02c51167..ca896ec2 100644
--- a/tests/reference/gui/2_nwProject.nwx
+++ b/tests/reference/gui/2_nwProject.nwx
@@ -9,6 +9,7 @@
   </project>
   <settings>
     <spellCheck>False</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>None</lastEdited>
     <lastViewed>None</lastViewed>
     <lastWordCount>0</lastWordCount>
diff --git a/tests/reference/gui/3_nwProject.nwx b/tests/reference/gui/3_nwProject.nwx
index 503c011c..f0bda720 100644
--- a/tests/reference/gui/3_nwProject.nwx
+++ b/tests/reference/gui/3_nwProject.nwx
@@ -7,6 +7,7 @@
   </project>
   <settings>
     <spellCheck>False</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>None</lastEdited>
     <lastViewed>None</lastViewed>
     <lastWordCount>0</lastWordCount>
diff --git a/tests/reference/proj/1_nwProject.nwx b/tests/reference/proj/1_nwProject.nwx
index 4960024b..319d24b3 100644
--- a/tests/reference/proj/1_nwProject.nwx
+++ b/tests/reference/proj/1_nwProject.nwx
@@ -7,6 +7,7 @@
   </project>
   <settings>
     <spellCheck>False</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>None</lastEdited>
     <lastViewed>None</lastViewed>
     <lastWordCount>0</lastWordCount>
diff --git a/tests/reference/proj/2_nwProject.nwx b/tests/reference/proj/2_nwProject.nwx
index 0a8e6b4d..a40a2e8d 100644
--- a/tests/reference/proj/2_nwProject.nwx
+++ b/tests/reference/proj/2_nwProject.nwx
@@ -7,6 +7,7 @@
   </project>
   <settings>
     <spellCheck>False</spellCheck>
+    <autoOutline>True</autoOutline>
     <lastEdited>None</lastEdited>
     <lastViewed>None</lastViewed>
     <lastWordCount>0</lastWordCount>