diff --git a/Lib/fontTools/feaLib/builder_test.py b/Lib/fontTools/feaLib/builder_test.py
index 093206da2..337d97508 100644
--- a/Lib/fontTools/feaLib/builder_test.py
+++ b/Lib/fontTools/feaLib/builder_test.py
@@ -39,7 +39,7 @@ def makeTTFont():
         a_n_d T_h T_h.swash germandbls ydieresis yacute breve
         grave acute dieresis macron circumflex cedilla umlaut ogonek caron
         damma hamza sukun kasratan lam_meem_jeem noon.final noon.initial
-        \\glyphNameWithBackslash1 \\glyphNameWithBackslash2
+        by feature lookup sub table
     """.split()
     font = TTFont()
     font.setGlyphOrder(glyphs)
diff --git a/Lib/fontTools/feaLib/testdata/bug457.fea b/Lib/fontTools/feaLib/testdata/bug457.fea
index 90d28cdde..0e8f16913 100644
--- a/Lib/fontTools/feaLib/testdata/bug457.fea
+++ b/Lib/fontTools/feaLib/testdata/bug457.fea
@@ -1,4 +1,4 @@
-@group = [\glyphNameWithBackslash1 \glyphNameWithBackslash2];
+@group = [\A \sub \lookup \feature \by \table];
 
 feature liga {
     sub @group by G;
diff --git a/Lib/fontTools/feaLib/testdata/bug457.ttx b/Lib/fontTools/feaLib/testdata/bug457.ttx
index 1eabc9570..bad53020d 100644
--- a/Lib/fontTools/feaLib/testdata/bug457.ttx
+++ b/Lib/fontTools/feaLib/testdata/bug457.ttx
@@ -34,8 +34,12 @@
         <LookupFlag value="0"/>
         <!-- SubTableCount=1 -->
         <SingleSubst index="0">
-          <Substitution in="\glyphNameWithBackslash1" out="G"/>
-          <Substitution in="\glyphNameWithBackslash2" out="G"/>
+          <Substitution in="A" out="G"/>
+          <Substitution in="by" out="G"/>
+          <Substitution in="feature" out="G"/>
+          <Substitution in="lookup" out="G"/>
+          <Substitution in="sub" out="G"/>
+          <Substitution in="table" out="G"/>
         </SingleSubst>
       </Lookup>
     </LookupList>