diff --git a/resources/scripts/tidy_glyphs.py b/resources/scripts/tidy_glyphs.py
index 4d1fb03d..dbff48ac 100644
--- a/resources/scripts/tidy_glyphs.py
+++ b/resources/scripts/tidy_glyphs.py
@@ -12,10 +12,11 @@
 }
 
 _DELETE_ME = {
-    ".appVersion",
-    "DisplayStrings"
-    "date"
-    "lastChange"
+    # Keep .appVersion, per @anthrotype Glyphs.app makes decisions based on this
+    # ".appVersion",
+    "DisplayStrings",
+    "date",
+    "lastChange",
 }
 
 
diff --git a/resources/testdata/glyphs2/BadIndexing.glyphs b/resources/testdata/glyphs2/BadIndexing.glyphs
index 63705379..4ce6bb8e 100644
--- a/resources/testdata/glyphs2/BadIndexing.glyphs
+++ b/resources/testdata/glyphs2/BadIndexing.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = "Variable Font Origin";
diff --git a/resources/testdata/glyphs2/Component.glyphs b/resources/testdata/glyphs2/Component.glyphs
index 99b900c2..9cfff2f7 100644
--- a/resources/testdata/glyphs2/Component.glyphs
+++ b/resources/testdata/glyphs2/Component.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 familyName = "New Font";
 fontMaster = (
 {
diff --git a/resources/testdata/glyphs2/FeaLegacyName.glyphs b/resources/testdata/glyphs2/FeaLegacyName.glyphs
index ad55774e..09a8b064 100644
--- a/resources/testdata/glyphs2/FeaLegacyName.glyphs
+++ b/resources/testdata/glyphs2/FeaLegacyName.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 familyName = "legacy stylistic set names";
 features = (
 {
diff --git a/resources/testdata/glyphs2/Fea_Class.glyphs b/resources/testdata/glyphs2/Fea_Class.glyphs
index 25e85c85..eea2de44 100644
--- a/resources/testdata/glyphs2/Fea_Class.glyphs
+++ b/resources/testdata/glyphs2/Fea_Class.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 classes = (
 {
 automatic = 1;
diff --git a/resources/testdata/glyphs2/Fea_Feature.glyphs b/resources/testdata/glyphs2/Fea_Feature.glyphs
index fea1eb00..420cfe0d 100644
--- a/resources/testdata/glyphs2/Fea_Feature.glyphs
+++ b/resources/testdata/glyphs2/Fea_Feature.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/Fea_Order.glyphs b/resources/testdata/glyphs2/Fea_Order.glyphs
index fb91e20a..68a4d553 100644
--- a/resources/testdata/glyphs2/Fea_Order.glyphs
+++ b/resources/testdata/glyphs2/Fea_Order.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/Fea_Prefix.glyphs b/resources/testdata/glyphs2/Fea_Prefix.glyphs
index 041fd9d2..883636e3 100644
--- a/resources/testdata/glyphs2/Fea_Prefix.glyphs
+++ b/resources/testdata/glyphs2/Fea_Prefix.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/IntermediateLayer.glyphs b/resources/testdata/glyphs2/IntermediateLayer.glyphs
index d4c06501..9e4ead34 100644
--- a/resources/testdata/glyphs2/IntermediateLayer.glyphs
+++ b/resources/testdata/glyphs2/IntermediateLayer.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3300";
 customParameters = (
 {
 name = "Disable Last Change";
diff --git a/resources/testdata/glyphs2/MVAR.glyphs b/resources/testdata/glyphs2/MVAR.glyphs
index 2ea92c62..46888156 100644
--- a/resources/testdata/glyphs2/MVAR.glyphs
+++ b/resources/testdata/glyphs2/MVAR.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3228";
 customParameters = (
 {
 name = "Variable Font Origin";
diff --git a/resources/testdata/glyphs2/MasterNames-Italic.glyphs b/resources/testdata/glyphs2/MasterNames-Italic.glyphs
index 22538f0b..96faa6ad 100644
--- a/resources/testdata/glyphs2/MasterNames-Italic.glyphs
+++ b/resources/testdata/glyphs2/MasterNames-Italic.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3323";
 customParameters = (
 {
 name = "Disable Last Change";
diff --git a/resources/testdata/glyphs2/MasterNames.glyphs b/resources/testdata/glyphs2/MasterNames.glyphs
index 1ad7002e..d6324783 100644
--- a/resources/testdata/glyphs2/MasterNames.glyphs
+++ b/resources/testdata/glyphs2/MasterNames.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3323";
 customParameters = (
 {
 name = "Disable Last Change";
diff --git a/resources/testdata/glyphs2/MatrixComponent.glyphs b/resources/testdata/glyphs2/MatrixComponent.glyphs
index be615366..d8d79828 100644
--- a/resources/testdata/glyphs2/MatrixComponent.glyphs
+++ b/resources/testdata/glyphs2/MatrixComponent.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 familyName = MatrixComponent;
 fontMaster = (
 {
diff --git a/resources/testdata/glyphs2/MixedContourComponent.glyphs b/resources/testdata/glyphs2/MixedContourComponent.glyphs
index 4440e503..2a0a01c3 100644
--- a/resources/testdata/glyphs2/MixedContourComponent.glyphs
+++ b/resources/testdata/glyphs2/MixedContourComponent.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 familyName = "New Font";
 fontMaster = (
 {
diff --git a/resources/testdata/glyphs2/OpszWghtVar_AxisMappings.glyphs b/resources/testdata/glyphs2/OpszWghtVar_AxisMappings.glyphs
index 882482eb..4445e567 100644
--- a/resources/testdata/glyphs2/OpszWghtVar_AxisMappings.glyphs
+++ b/resources/testdata/glyphs2/OpszWghtVar_AxisMappings.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/QCurve.glyphs b/resources/testdata/glyphs2/QCurve.glyphs
index eb094aa2..fe72bb38 100644
--- a/resources/testdata/glyphs2/QCurve.glyphs
+++ b/resources/testdata/glyphs2/QCurve.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3208";
 customParameters = (
 {
 name = "Disable Last Change";
diff --git a/resources/testdata/glyphs2/SlantedFont.glyphs b/resources/testdata/glyphs2/SlantedFont.glyphs
index 63cd7532..a574aeae 100644
--- a/resources/testdata/glyphs2/SlantedFont.glyphs
+++ b/resources/testdata/glyphs2/SlantedFont.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3227";
 customParameters = (
 {
 name = "Variable Font Origin";
diff --git a/resources/testdata/glyphs2/TheBestNames.glyphs b/resources/testdata/glyphs2/TheBestNames.glyphs
index 746a980d..725318c9 100644
--- a/resources/testdata/glyphs2/TheBestNames.glyphs
+++ b/resources/testdata/glyphs2/TheBestNames.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WdthVar.glyphs b/resources/testdata/glyphs2/WdthVar.glyphs
index 542075ea..bfd06875 100644
--- a/resources/testdata/glyphs2/WdthVar.glyphs
+++ b/resources/testdata/glyphs2/WdthVar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3323";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar.glyphs b/resources/testdata/glyphs2/WghtVar.glyphs
index 07dd5dbd..ecab6a00 100644
--- a/resources/testdata/glyphs2/WghtVar.glyphs
+++ b/resources/testdata/glyphs2/WghtVar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/WghtVar.glyphspackage/fontinfo.plist
index 37b15296..97cb489c 100644
--- a/resources/testdata/glyphs2/WghtVar.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/WghtVar.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_Anchors.glyphs b/resources/testdata/glyphs2/WghtVar_Anchors.glyphs
index a5b5bc80..56f77c99 100644
--- a/resources/testdata/glyphs2/WghtVar_Anchors.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_Anchors.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/WghtVar_Anchors.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/WghtVar_Anchors.glyphspackage/fontinfo.plist
index 34325317..bc967e84 100644
--- a/resources/testdata/glyphs2/WghtVar_Anchors.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/WghtVar_Anchors.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/WghtVar_Avar.glyphs b/resources/testdata/glyphs2/WghtVar_Avar.glyphs
index 147318f4..fafdf33e 100644
--- a/resources/testdata/glyphs2/WghtVar_Avar.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_Avar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_Avar.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/WghtVar_Avar.glyphspackage/fontinfo.plist
index 742eb960..fc94052a 100644
--- a/resources/testdata/glyphs2/WghtVar_Avar.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/WghtVar_Avar.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_HeavyHyphen.glyphs b/resources/testdata/glyphs2/WghtVar_HeavyHyphen.glyphs
index 33d7390f..2cde421c 100644
--- a/resources/testdata/glyphs2/WghtVar_HeavyHyphen.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_HeavyHyphen.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/WghtVar_ImplicitAxes.glyphs b/resources/testdata/glyphs2/WghtVar_ImplicitAxes.glyphs
index da67a107..7860412e 100644
--- a/resources/testdata/glyphs2/WghtVar_ImplicitAxes.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_ImplicitAxes.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3340";
 customParameters = (
 );
 familyName = WghtVar;
diff --git a/resources/testdata/glyphs2/WghtVar_Instances.glyphs b/resources/testdata/glyphs2/WghtVar_Instances.glyphs
index 960a8494..ebb03813 100644
--- a/resources/testdata/glyphs2/WghtVar_Instances.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_Instances.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_Instances.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/WghtVar_Instances.glyphspackage/fontinfo.plist
index 4d5e92c6..aa311fec 100644
--- a/resources/testdata/glyphs2/WghtVar_Instances.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/WghtVar_Instances.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_NoExport.glyphs b/resources/testdata/glyphs2/WghtVar_NoExport.glyphs
index 82218315..269dee19 100644
--- a/resources/testdata/glyphs2/WghtVar_NoExport.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_NoExport.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3226";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_OS2.glyphs b/resources/testdata/glyphs2/WghtVar_OS2.glyphs
index 5129729b..3300c0e1 100644
--- a/resources/testdata/glyphs2/WghtVar_OS2.glyphs
+++ b/resources/testdata/glyphs2/WghtVar_OS2.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3340";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/WghtVar_OS2.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/WghtVar_OS2.glyphspackage/fontinfo.plist
index 0a2ea12a..093421de 100644
--- a/resources/testdata/glyphs2/WghtVar_OS2.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/WghtVar_OS2.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 copyright = "Copy!";
 customParameters = (
 {
diff --git a/resources/testdata/glyphs2/alignment_zones_v2.glyphs b/resources/testdata/glyphs2/alignment_zones_v2.glyphs
index 5d93fa50..1aecd335 100644
--- a/resources/testdata/glyphs2/alignment_zones_v2.glyphs
+++ b/resources/testdata/glyphs2/alignment_zones_v2.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "1365";
 familyName = "New Font";
 fontMaster = (
 {
diff --git a/resources/testdata/glyphs2/infinity.glyphs b/resources/testdata/glyphs2/infinity.glyphs
index bc2a7398..e9f2a964 100644
--- a/resources/testdata/glyphs2/infinity.glyphs
+++ b/resources/testdata/glyphs2/infinity.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs2/infinity.glyphspackage/fontinfo.plist b/resources/testdata/glyphs2/infinity.glyphspackage/fontinfo.plist
index a44986a8..f526e30c 100644
--- a/resources/testdata/glyphs2/infinity.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs2/infinity.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 customParameters = (
 {
 name = Axes;
diff --git a/resources/testdata/glyphs3/Component.glyphs b/resources/testdata/glyphs3/Component.glyphs
index 372f8df8..c17aece8 100644
--- a/resources/testdata/glyphs3/Component.glyphs
+++ b/resources/testdata/glyphs3/Component.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 familyName = "New Font";
 fontMaster = (
diff --git a/resources/testdata/glyphs3/ComponentAnchor.glyphs b/resources/testdata/glyphs3/ComponentAnchor.glyphs
index 0567ded3..caa89ca8 100644
--- a/resources/testdata/glyphs3/ComponentAnchor.glyphs
+++ b/resources/testdata/glyphs3/ComponentAnchor.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3259";
 .formatVersion = 3;
 familyName = "New Font";
 fontMaster = (
diff --git a/resources/testdata/glyphs3/CustomOrigin.glyphs b/resources/testdata/glyphs3/CustomOrigin.glyphs
index be8d308d..b9de3910 100644
--- a/resources/testdata/glyphs3/CustomOrigin.glyphs
+++ b/resources/testdata/glyphs3/CustomOrigin.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3227";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/EmptyMetaTable.glyphs b/resources/testdata/glyphs3/EmptyMetaTable.glyphs
index bffd51db..bbd36179 100644
--- a/resources/testdata/glyphs3/EmptyMetaTable.glyphs
+++ b/resources/testdata/glyphs3/EmptyMetaTable.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 customParameters = (
 {
diff --git a/resources/testdata/glyphs3/Fea_Labels.glyphs b/resources/testdata/glyphs3/Fea_Labels.glyphs
index a7e0a03a..505523d5 100644
--- a/resources/testdata/glyphs3/Fea_Labels.glyphs
+++ b/resources/testdata/glyphs3/Fea_Labels.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3317";
 .formatVersion = 3;
 familyName = "GlobalMetrics Font Test";
 features = (
diff --git a/resources/testdata/glyphs3/FixedPitch.glyphs b/resources/testdata/glyphs3/FixedPitch.glyphs
index accf19bb..f713f25f 100644
--- a/resources/testdata/glyphs3/FixedPitch.glyphs
+++ b/resources/testdata/glyphs3/FixedPitch.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/GlobalMetrics_font_customParameters.glyphs b/resources/testdata/glyphs3/GlobalMetrics_font_customParameters.glyphs
index 25ee806a..d9db7e53 100644
--- a/resources/testdata/glyphs3/GlobalMetrics_font_customParameters.glyphs
+++ b/resources/testdata/glyphs3/GlobalMetrics_font_customParameters.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3316";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/IntermediateLayer.glyphs b/resources/testdata/glyphs3/IntermediateLayer.glyphs
index 7e8ea2b1..9bc137e3 100644
--- a/resources/testdata/glyphs3/IntermediateLayer.glyphs
+++ b/resources/testdata/glyphs3/IntermediateLayer.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3300";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/InvalidVendorID.glyphs b/resources/testdata/glyphs3/InvalidVendorID.glyphs
index ec125b6b..183d429d 100644
--- a/resources/testdata/glyphs3/InvalidVendorID.glyphs
+++ b/resources/testdata/glyphs3/InvalidVendorID.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/MVAR.glyphs b/resources/testdata/glyphs3/MVAR.glyphs
index dea3b39d..c7a4883f 100644
--- a/resources/testdata/glyphs3/MVAR.glyphs
+++ b/resources/testdata/glyphs3/MVAR.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3228";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/MasterNames-Italic.glyphs b/resources/testdata/glyphs3/MasterNames-Italic.glyphs
index d0e7d2d1..524066dd 100644
--- a/resources/testdata/glyphs3/MasterNames-Italic.glyphs
+++ b/resources/testdata/glyphs3/MasterNames-Italic.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3323";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/MasterNames.glyphs b/resources/testdata/glyphs3/MasterNames.glyphs
index 6fa50b87..67714677 100644
--- a/resources/testdata/glyphs3/MasterNames.glyphs
+++ b/resources/testdata/glyphs3/MasterNames.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3323";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/MetaTable.glyphs b/resources/testdata/glyphs3/MetaTable.glyphs
index ea03dc6e..1839109e 100644
--- a/resources/testdata/glyphs3/MetaTable.glyphs
+++ b/resources/testdata/glyphs3/MetaTable.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 customParameters = (
 {
diff --git a/resources/testdata/glyphs3/NestedComponent.glyphs b/resources/testdata/glyphs3/NestedComponent.glyphs
index ec87d265..ccde2f12 100644
--- a/resources/testdata/glyphs3/NestedComponent.glyphs
+++ b/resources/testdata/glyphs3/NestedComponent.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 customParameters = (
 {
diff --git a/resources/testdata/glyphs3/NoMetaTable.glyphs b/resources/testdata/glyphs3/NoMetaTable.glyphs
index f25faa86..3882edf6 100644
--- a/resources/testdata/glyphs3/NoMetaTable.glyphs
+++ b/resources/testdata/glyphs3/NoMetaTable.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 familyName = NoMetaTable;
 fontMaster = (
diff --git a/resources/testdata/glyphs3/Oswald-AE-comb.glyphs b/resources/testdata/glyphs3/Oswald-AE-comb.glyphs
index 1225cd5b..fb640a76 100644
--- a/resources/testdata/glyphs3/Oswald-AE-comb.glyphs
+++ b/resources/testdata/glyphs3/Oswald-AE-comb.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3223";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/Oswald-O.glyphs b/resources/testdata/glyphs3/Oswald-O.glyphs
index 8ec35159..2c6080ab 100644
--- a/resources/testdata/glyphs3/Oswald-O.glyphs
+++ b/resources/testdata/glyphs3/Oswald-O.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3192";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/Oswald-glyph-categories.glyphs b/resources/testdata/glyphs3/Oswald-glyph-categories.glyphs
index 79192e9c..b584c854 100644
--- a/resources/testdata/glyphs3/Oswald-glyph-categories.glyphs
+++ b/resources/testdata/glyphs3/Oswald-glyph-categories.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/PropagateAnchorsTest-propagated.glyphs b/resources/testdata/glyphs3/PropagateAnchorsTest-propagated.glyphs
index ad27dff3..0ef4d82a 100644
--- a/resources/testdata/glyphs3/PropagateAnchorsTest-propagated.glyphs
+++ b/resources/testdata/glyphs3/PropagateAnchorsTest-propagated.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3300";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/PropagateAnchorsTest.glyphs b/resources/testdata/glyphs3/PropagateAnchorsTest.glyphs
index e1e714b0..bd3b738f 100644
--- a/resources/testdata/glyphs3/PropagateAnchorsTest.glyphs
+++ b/resources/testdata/glyphs3/PropagateAnchorsTest.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3300";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/QCurve.glyphs b/resources/testdata/glyphs3/QCurve.glyphs
index 4f9a3ea7..0498f734 100644
--- a/resources/testdata/glyphs3/QCurve.glyphs
+++ b/resources/testdata/glyphs3/QCurve.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3208";
 .formatVersion = 3;
 customParameters = (
 {
diff --git a/resources/testdata/glyphs3/SlantedFont.glyphs b/resources/testdata/glyphs3/SlantedFont.glyphs
index 13178895..0f35f5f2 100644
--- a/resources/testdata/glyphs3/SlantedFont.glyphs
+++ b/resources/testdata/glyphs3/SlantedFont.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3227";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/StandardAxisNames.glyphs b/resources/testdata/glyphs3/StandardAxisNames.glyphs
index afbdbf05..cc01020e 100644
--- a/resources/testdata/glyphs3/StandardAxisNames.glyphs
+++ b/resources/testdata/glyphs3/StandardAxisNames.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3324";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/StaticBoldItalic.glyphs b/resources/testdata/glyphs3/StaticBoldItalic.glyphs
index c1207231..294ea7be 100644
--- a/resources/testdata/glyphs3/StaticBoldItalic.glyphs
+++ b/resources/testdata/glyphs3/StaticBoldItalic.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 familyName = WghtVar;
 fontMaster = (
diff --git a/resources/testdata/glyphs3/StaticWithInstance.glyphs b/resources/testdata/glyphs3/StaticWithInstance.glyphs
index 348f613a..b4e6f9e3 100644
--- a/resources/testdata/glyphs3/StaticWithInstance.glyphs
+++ b/resources/testdata/glyphs3/StaticWithInstance.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 familyName = WghtVar;
 fontMaster = (
diff --git a/resources/testdata/glyphs3/TheBestNames.glyphs b/resources/testdata/glyphs3/TheBestNames.glyphs
index 1ee39692..fccc378e 100644
--- a/resources/testdata/glyphs3/TheBestNames.glyphs
+++ b/resources/testdata/glyphs3/TheBestNames.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/TheBestV2NamesInAV3File.glyphs b/resources/testdata/glyphs3/TheBestV2NamesInAV3File.glyphs
index 753c7ced..dc87c4e7 100644
--- a/resources/testdata/glyphs3/TheBestV2NamesInAV3File.glyphs
+++ b/resources/testdata/glyphs3/TheBestV2NamesInAV3File.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3151";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/UnusualCustomParams.glyphs b/resources/testdata/glyphs3/UnusualCustomParams.glyphs
index 446f04a1..b440ea90 100644
--- a/resources/testdata/glyphs3/UnusualCustomParams.glyphs
+++ b/resources/testdata/glyphs3/UnusualCustomParams.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 customParameters = (
 {
diff --git a/resources/testdata/glyphs3/WdthVar.glyphs b/resources/testdata/glyphs3/WdthVar.glyphs
index 58ae559f..d8510322 100644
--- a/resources/testdata/glyphs3/WdthVar.glyphs
+++ b/resources/testdata/glyphs3/WdthVar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3316";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar.glyphs b/resources/testdata/glyphs3/WghtVar.glyphs
index 212f116c..23fd5cc6 100644
--- a/resources/testdata/glyphs3/WghtVar.glyphs
+++ b/resources/testdata/glyphs3/WghtVar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/WghtVar.glyphspackage/fontinfo.plist
index 60e02cf7..856e966b 100644
--- a/resources/testdata/glyphs3/WghtVar.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/WghtVar.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVarWithStylisticSet.glyphs b/resources/testdata/glyphs3/WghtVarWithStylisticSet.glyphs
index d23d9687..75f38f15 100644
--- a/resources/testdata/glyphs3/WghtVarWithStylisticSet.glyphs
+++ b/resources/testdata/glyphs3/WghtVarWithStylisticSet.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_3master_CustomOrigin.glyphs b/resources/testdata/glyphs3/WghtVar_3master_CustomOrigin.glyphs
index 51c67b50..674f3803 100644
--- a/resources/testdata/glyphs3/WghtVar_3master_CustomOrigin.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_3master_CustomOrigin.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Anchors.glyphs b/resources/testdata/glyphs3/WghtVar_Anchors.glyphs
index 2a1aeb07..d3b14be6 100644
--- a/resources/testdata/glyphs3/WghtVar_Anchors.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_Anchors.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Anchors.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/WghtVar_Anchors.glyphspackage/fontinfo.plist
index 98f8f186..1ecdd732 100644
--- a/resources/testdata/glyphs3/WghtVar_Anchors.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/WghtVar_Anchors.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Avar.glyphs b/resources/testdata/glyphs3/WghtVar_Avar.glyphs
index f1a702a5..0771ae58 100644
--- a/resources/testdata/glyphs3/WghtVar_Avar.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_Avar.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Avar.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/WghtVar_Avar.glyphspackage/fontinfo.plist
index 96005d2f..8a005cf8 100644
--- a/resources/testdata/glyphs3/WghtVar_Avar.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/WghtVar_Avar.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Avar_From_Instances.glyphs b/resources/testdata/glyphs3/WghtVar_Avar_From_Instances.glyphs
index f7d15485..f0d8578c 100644
--- a/resources/testdata/glyphs3/WghtVar_Avar_From_Instances.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_Avar_From_Instances.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3316";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_AxisLocation.glyphs b/resources/testdata/glyphs3/WghtVar_AxisLocation.glyphs
index bc37bdd1..ceb3789e 100644
--- a/resources/testdata/glyphs3/WghtVar_AxisLocation.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_AxisLocation.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_GlyphOrder.glyphs b/resources/testdata/glyphs3/WghtVar_GlyphOrder.glyphs
index 3ab7cd84..8ef429c0 100644
--- a/resources/testdata/glyphs3/WghtVar_GlyphOrder.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_GlyphOrder.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_HeavyHyphen.glyphs b/resources/testdata/glyphs3/WghtVar_HeavyHyphen.glyphs
index d7957bdf..cdeca9ed 100644
--- a/resources/testdata/glyphs3/WghtVar_HeavyHyphen.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_HeavyHyphen.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3148";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Instances.glyphs b/resources/testdata/glyphs3/WghtVar_Instances.glyphs
index 30716ab5..944e730b 100644
--- a/resources/testdata/glyphs3/WghtVar_Instances.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_Instances.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_Instances.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/WghtVar_Instances.glyphspackage/fontinfo.plist
index ed557df3..4f5fe3b8 100644
--- a/resources/testdata/glyphs3/WghtVar_Instances.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/WghtVar_Instances.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_NoExport.glyphs b/resources/testdata/glyphs3/WghtVar_NoExport.glyphs
index 2cc7b1e8..d4641c67 100644
--- a/resources/testdata/glyphs3/WghtVar_NoExport.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_NoExport.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3226";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_OS2.glyphs b/resources/testdata/glyphs3/WghtVar_OS2.glyphs
index 2f594e2c..7941068e 100644
--- a/resources/testdata/glyphs3/WghtVar_OS2.glyphs
+++ b/resources/testdata/glyphs3/WghtVar_OS2.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/WghtVar_OS2.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/WghtVar_OS2.glyphspackage/fontinfo.plist
index d06f1b5f..16c9f9ce 100644
--- a/resources/testdata/glyphs3/WghtVar_OS2.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/WghtVar_OS2.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/custom_param_disable.glyphs b/resources/testdata/glyphs3/custom_param_disable.glyphs
index 48ec5a69..a98d8777 100644
--- a/resources/testdata/glyphs3/custom_param_disable.glyphs
+++ b/resources/testdata/glyphs3/custom_param_disable.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 customParameters = (
 {
 disabled = 1;
diff --git a/resources/testdata/glyphs3/fstype_0x0000.glyphs b/resources/testdata/glyphs3/fstype_0x0000.glyphs
index f22992ae..9fcdeca5 100644
--- a/resources/testdata/glyphs3/fstype_0x0000.glyphs
+++ b/resources/testdata/glyphs3/fstype_0x0000.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/fstype_0x0104.glyphs b/resources/testdata/glyphs3/fstype_0x0104.glyphs
index 2f7517c1..5b5af315 100644
--- a/resources/testdata/glyphs3/fstype_0x0104.glyphs
+++ b/resources/testdata/glyphs3/fstype_0x0104.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/gdef_categories_no_layout.glyphs b/resources/testdata/glyphs3/gdef_categories_no_layout.glyphs
index 1f370a3d..aa4efc8e 100644
--- a/resources/testdata/glyphs3/gdef_categories_no_layout.glyphs
+++ b/resources/testdata/glyphs3/gdef_categories_no_layout.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 familyName = Dated;
 fontMaster = (
diff --git a/resources/testdata/glyphs3/infinity.glyphs b/resources/testdata/glyphs3/infinity.glyphs
index e18c43b8..e4053343 100644
--- a/resources/testdata/glyphs3/infinity.glyphs
+++ b/resources/testdata/glyphs3/infinity.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/infinity.glyphspackage/fontinfo.plist b/resources/testdata/glyphs3/infinity.glyphspackage/fontinfo.plist
index 937d03a2..3f957afe 100644
--- a/resources/testdata/glyphs3/infinity.glyphspackage/fontinfo.plist
+++ b/resources/testdata/glyphs3/infinity.glyphspackage/fontinfo.plist
@@ -1,4 +1,5 @@
 {
+.appVersion = "3219";
 .formatVersion = 3;
 axes = (
 {
diff --git a/resources/testdata/glyphs3/number_value.glyphs b/resources/testdata/glyphs3/number_value.glyphs
index 12e0a3c4..27e143ef 100644
--- a/resources/testdata/glyphs3/number_value.glyphs
+++ b/resources/testdata/glyphs3/number_value.glyphs
@@ -1,4 +1,5 @@
 {
+.appVersion = "3260";
 .formatVersion = 3;
 axes = (
 {