diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index baac587..fa51224 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -182,7 +182,7 @@
   var res = execute('disass s:ScriptFuncPush')
   assert_match('<SNR>\d*_ScriptFuncPush.*' ..
         'localbool = true.*' ..
-        ' PUSH v:true.*' ..
+        ' PUSH true.*' ..
         'localspec = v:none.*' ..
         ' PUSH v:none.*' ..
         'localblob = 0z1234.*' ..
@@ -1461,7 +1461,7 @@
   var instr = execute('disassemble InvertBool')
   assert_match('InvertBool\_s*' ..
         'var flag = true\_s*' ..
-        '\d PUSH v:true\_s*' ..
+        '\d PUSH true\_s*' ..
         '\d STORE $0\_s*' ..
         'var invert = !flag\_s*' ..
         '\d LOAD $0\_s*' ..
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index e77c1f7..8fe0418 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1056,14 +1056,19 @@
       assert_equal('123 hello', 123 .. ' hello')
       assert_equal('123456', 123 .. 456)
 
-      assert_equal('av:true', 'a' .. true)
-      assert_equal('av:false', 'a' .. false)
+      assert_equal('atrue', 'a' .. true)
+      assert_equal('afalse', 'a' .. false)
       assert_equal('av:null', 'a' .. v:null)
       assert_equal('av:none', 'a' .. v:none)
       if has('float')
         assert_equal('a0.123', 'a' .. 0.123)
       endif
 
+      set digraph
+      assert_equal('val: true', 'val: ' .. &digraph)
+      set nodigraph
+      assert_equal('val: false', 'val: ' .. &digraph)
+
       assert_equal([1, 2, 3, 4], [1, 2] + [3, 4])
       assert_equal(0z11223344, 0z1122 + 0z3344)
       assert_equal(0z112201ab, 0z1122