diff --git a/Tests/otlLib/data/gsub_71.ttx b/Tests/otlLib/data/gsub_71.ttx
index 201de4cbe..acf6cdb6e 100644
--- a/Tests/otlLib/data/gsub_71.ttx
+++ b/Tests/otlLib/data/gsub_71.ttx
@@ -87,7 +87,7 @@
         <!-- SubTableCount=1 -->
         <ExtensionSubst index="0" Format="1">
           <ExtensionLookupType value="1"/>
-          <SingleSubst Format="1">
+          <SingleSubst>
             <Substitution in="g18" out="g23"/>
             <Substitution in="g19" out="g24"/>
           </SingleSubst>
diff --git a/Tests/ttLib/tables/data/aots/gsub7_font1.ttx.GSUB b/Tests/ttLib/tables/data/aots/gsub7_font1.ttx.GSUB
index 3f65d93a8..cf43ec639 100644
--- a/Tests/ttLib/tables/data/aots/gsub7_font1.ttx.GSUB
+++ b/Tests/ttLib/tables/data/aots/gsub7_font1.ttx.GSUB
@@ -35,7 +35,7 @@
         <!-- SubTableCount=1 -->
         <ExtensionSubst index="0" Format="1">
           <ExtensionLookupType value="1"/>
-          <SingleSubst Format="1">
+          <SingleSubst>
             <Substitution in="g18" out="g23"/>
             <Substitution in="g19" out="g24"/>
           </SingleSubst>
diff --git a/Tests/ttLib/tables/data/aots/gsub7_font2.ttx.GSUB b/Tests/ttLib/tables/data/aots/gsub7_font2.ttx.GSUB
index 98338ed5d..1f488f31b 100644
--- a/Tests/ttLib/tables/data/aots/gsub7_font2.ttx.GSUB
+++ b/Tests/ttLib/tables/data/aots/gsub7_font2.ttx.GSUB
@@ -35,13 +35,13 @@
         <!-- SubTableCount=2 -->
         <ExtensionSubst index="0" Format="1">
           <ExtensionLookupType value="1"/>
-          <SingleSubst Format="1">
+          <SingleSubst>
             <Substitution in="g18" out="g23"/>
           </SingleSubst>
         </ExtensionSubst>
         <ExtensionSubst index="1" Format="1">
           <ExtensionLookupType value="1"/>
-          <SingleSubst Format="1">
+          <SingleSubst>
             <Substitution in="g19" out="g29"/>
           </SingleSubst>
         </ExtensionSubst>