diff --git a/autoload/vimtex/syntax/core.vim b/autoload/vimtex/syntax/core.vim
index 99b9d7b204..0764599211 100644
--- a/autoload/vimtex/syntax/core.vim
+++ b/autoload/vimtex/syntax/core.vim
@@ -1396,16 +1396,20 @@ endfunction
 
 let s:re_sub =
       \ '[-+=()0-9aehijklmnoprstuvx]\|\\\%('
-      \ . join([
-      \     'beta', 'rho', 'phi', 'gamma', 'chi'
+      \ .. join([
+      \     'beta', 'gamma', 'rho', 'phi', 'chi'
+      \ ], '\|') . '\)\>'
+let s:re_super =
+      \ '[-+=()<>:;0-9a-qr-zA-FG-QRTUVW]\|\\\%('
+      \ .. join([
+      \     'beta', 'gamma', 'delta', 'epsilon', 'theta', 'iota', 'phi', 'chi'
       \ ], '\|') . '\)\>'
-let s:re_super = '[-+=()<>:;0-9a-pr-zABDEG-PRTUVW]'
 
 let s:map_sub = [
       \ ['\\beta\>',  'ᵦ'],
-      \ ['\\rho\>', 'ᵨ'],
-      \ ['\\phi\>',   'ᵩ'],
       \ ['\\gamma\>', 'ᵧ'],
+      \ ['\\rho\>',   'ᵨ'],
+      \ ['\\phi\>',   'ᵩ'],
       \ ['\\chi\>',   'ᵪ'],
       \ ['(',         '₍'],
       \ [')',         '₎'],
diff --git a/test/test-syntax/test-conceal.tex b/test/test-syntax/test-conceal.tex
index 1923d55f0e..b46fe0405b 100644
--- a/test/test-syntax/test-conceal.tex
+++ b/test/test-syntax/test-conceal.tex
@@ -22,6 +22,19 @@
 $a_\rho$
 $\ket{\psi_{i+1}}$
 
+$a^q$
+$a^C$
+$a^F$
+$a^Q$
+$a^{\beta}$
+$a^{\gamma}$
+$a^{\delta}$
+$a^{\epsilon}$
+$a^{\theta}$
+$a^{\iota}$
+$a^{\phi}$
+$a^{\chi}$
+
 $a^1$
 $a^+$
 $a^-$