diff --git a/runtime/syntax/testdir/dumps/vim9_expr_00.dump b/runtime/syntax/testdir/dumps/vim9_expr_00.dump
new file mode 100644
index 0000000..2c7da39
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim9_expr_00.dump
@@ -0,0 +1,20 @@
+>v+0#af5f00255#ffffff0|i|m|9|s|c|r|i|p|t| +0#0000000&@64
+|#+0#0000e05&| |V|i|m|9|-|s|c|r|i|p|t| |e|x|p|r|e|s@1|i|o|n|s| +0#0000000&@49
+@75
+@75
+|#+0#0000e05&| |C|o|m@1|a|n|d| |{|e|x|p|r|}| |a|r|g|u|m|e|n|t|s| +0#0000000&@48
+@75
+|i+0#af5f00255&|f| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@67
+@2|e+0#af5f00255&|c|h|o| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@63
+|e+0#af5f00255&|l|s|e|i|f| +0#0000000&|f+0#e000002&|a|l|s|e| +0#0000000&@62
+@2|e+0#af5f00255&|c|h|o| +0#0000000&|f+0#e000002&|a|l|s|e| +0#0000000&@62
+|e+0#af5f00255&|n|d|i|f| +0#0000000&@69
+@75
+|w+0#af5f00255&|h|i|l|e| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@64
+@2|b+0#af5f00255&|r|e|a|k| +0#0000000&@67
+|e+0#af5f00255&|n|d|w|h|i|l|e| +0#0000000&@66
+@75
+|d+0#af5f00255&|e|f| +0#0000000&|F|o@1|(+0#e000e06&|)|:+0#0000000&| |b+0#00e0003&|o@1|l| +0#0000000&@59
+@2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@61
+|e+0#af5f00255&|n|d@1|e|f| +0#0000000&@68
+@57|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/vim9_expr_01.dump b/runtime/syntax/testdir/dumps/vim9_expr_01.dump
new file mode 100644
index 0000000..8cd3c68
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/vim9_expr_01.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@1|b+0#af5f00255&|r|e|a|k| +0#0000000&@67
+|e+0#af5f00255&|n|d|w|h|i|l|e| +0#0000000&@66
+@75
+|d+0#af5f00255&|e|f| +0#0000000&|F|o@1|(+0#e000e06&|)|:+0#0000000&| |b+0#00e0003&|o@1|l| +0#0000000&@59
+@2|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@61
+>e+0#af5f00255&|n|d@1|e|f| +0#0000000&@68
+@75
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+|~| @73
+| +0#0000000&@56|1|9|,|1| @9|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/vim_object_methods_00.dump b/runtime/syntax/testdir/dumps/vim_object_methods_00.dump
index 00c6cb4..990ff18 100644
--- a/runtime/syntax/testdir/dumps/vim_object_methods_00.dump
+++ b/runtime/syntax/testdir/dumps/vim_object_methods_00.dump
@@ -13,7 +13,7 @@
 @8|e+0#af5f00255&|n|d@1|e|f| +0#0000000&@60
 @75
 @8|d+0#af5f00255&|e|f| +0#0000000&|e+0#0000001#ffff4012|m|p|t|y|(+0#e000e06#ffffff0|)|:+0#0000000&| |b+0#00e0003&|o@1|l| +0#0000000&@49
-@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|f+0#00e0e07&|a|l|s|e| +0#0000000&@46
+@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|f+0#e000002&|a|l|s|e| +0#0000000&@46
 @8|e+0#af5f00255&|n|d@1|e|f| +0#0000000&@60
 @8|d+0#af5f00255&|e|f| +0#0000000&|l+0#0000001#ffff4012|e|n|(+0#e000e06#ffffff0|)|:+0#0000000&| |n+0#00e0003&|u|m|b|e|r| +0#0000000&@49
 @16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|2+0#e000002&| +0#0000000&@50
diff --git a/runtime/syntax/testdir/dumps/vim_object_methods_01.dump b/runtime/syntax/testdir/dumps/vim_object_methods_01.dump
index 05bb98f..d3af3d7 100644
--- a/runtime/syntax/testdir/dumps/vim_object_methods_01.dump
+++ b/runtime/syntax/testdir/dumps/vim_object_methods_01.dump
@@ -1,6 +1,6 @@
 | +0&#ffffff0@74
 @8|d+0#af5f00255&|e|f| +0#0000000&|e+0#0000001#ffff4012|m|p|t|y|(+0#e000e06#ffffff0|)|:+0#0000000&| |b+0#00e0003&|o@1|l| +0#0000000&@49
-@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|f+0#00e0e07&|a|l|s|e| +0#0000000&@46
+@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|f+0#e000002&|a|l|s|e| +0#0000000&@46
 @8|e+0#af5f00255&|n|d@1|e|f| +0#0000000&@60
 @8|d+0#af5f00255&|e|f| +0#0000000&|l+0#0000001#ffff4012|e|n|(+0#e000e06#ffffff0|)|:+0#0000000&| |n+0#00e0003&|u|m|b|e|r| +0#0000000&@49
 @16>r+0#af5f00255&|e|t|u|r|n| +0#0000000&|2+0#e000002&| +0#0000000&@50
diff --git a/runtime/syntax/testdir/dumps/vim_object_methods_02.dump b/runtime/syntax/testdir/dumps/vim_object_methods_02.dump
index d1c24f1..0ef5583 100644
--- a/runtime/syntax/testdir/dumps/vim_object_methods_02.dump
+++ b/runtime/syntax/testdir/dumps/vim_object_methods_02.dump
@@ -1,5 +1,5 @@
 | +0&#ffffff0@7|d+0#af5f00255&|e|f| +0#0000000&|e+0#0000001#ffff4012|m|p|t|y|(+0#e000e06#ffffff0|)|:+0#0000000&| |b+0#00e0003&|o@1|l| +0#0000000&@49
-@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|t+0#00e0e07&|r|u|e| +0#0000000&@47
+@16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|t+0#e000002&|r|u|e| +0#0000000&@47
 @8|e+0#af5f00255&|n|d@1|e|f| +0#0000000&@60
 @8|d+0#af5f00255&|e|f| +0#0000000&|l+0#0000001#ffff4012|e|n|(+0#e000e06#ffffff0|)|:+0#0000000&| |n+0#00e0003&|u|m|b|e|r| +0#0000000&@49
 @16|r+0#af5f00255&|e|t|u|r|n| +0#0000000&|0+0#e000002&| +0#0000000&@50
diff --git a/runtime/syntax/testdir/input/vim9_expr.vim b/runtime/syntax/testdir/input/vim9_expr.vim
new file mode 100644
index 0000000..784d861
--- /dev/null
+++ b/runtime/syntax/testdir/input/vim9_expr.vim
@@ -0,0 +1,20 @@
+vim9script
+# Vim9-script expressions
+
+
+# Command {expr} arguments
+
+if true
+  echo true
+elseif false
+  echo false
+endif
+
+while true
+  break
+endwhile
+
+def Foo(): bool
+  return true
+enddef
+