diff --git a/src/testdir/test_vim9_disassemble.vim b/src/testdir/test_vim9_disassemble.vim
index e104258..2e541d9 100644
--- a/src/testdir/test_vim9_disassemble.vim
+++ b/src/testdir/test_vim9_disassemble.vim
@@ -533,6 +533,30 @@
   assert_notmatch('JUMP', instr)
 enddef
 
+def ReturnInIf(): string
+  if g:cond
+    return "yes"
+  else
+    return "no"
+  endif
+enddef
+
+def Test_disassemble_return_in_if()
+  let instr = execute('disassemble ReturnInIf')
+  assert_match('ReturnInIf\_s*' ..
+        'if g:cond\_s*' ..
+        '0 LOADG g:cond\_s*' ..
+        '1 JUMP_IF_FALSE -> 4\_s*' ..
+        'return "yes"\_s*' ..
+        '2 PUSHS "yes"\_s*' ..
+        '3 RETURN\_s*' ..
+        'else\_s*' ..
+        ' return "no"\_s*' ..
+        '4 PUSHS "no"\_s*' ..
+        '5 RETURN$',
+        instr)
+enddef
+
 def WithFunc()
   let Funky1: func
   let Funky2: func = function("len")
diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
index c0a4d9b..499699c 100644
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -31,6 +31,31 @@
   assert_fails('call ReturnGlobal()', 'E1029: Expected number but got string')
 enddef
 
+def Test_missing_return()
+  CheckDefFailure(['def Missing(): number',
+                   '  if g:cond',
+                   '    echo "no return"',
+                   '  else',
+                   '    return 0',
+                   '  endif'
+                   'enddef'], 'E1027:')
+  CheckDefFailure(['def Missing(): number',
+                   '  if g:cond',
+                   '    return 1',
+                   '  else',
+                   '    echo "no return"',
+                   '  endif'
+                   'enddef'], 'E1027:')
+  CheckDefFailure(['def Missing(): number',
+                   '  if g:cond',
+                   '    return 1',
+                   '  else',
+                   '    return 2',
+                   '  endif'
+                   '  return 3'
+                   'enddef'], 'E1095:')
+enddef
+
 let s:nothing = 0
 def ReturnNothing()
   s:nothing = 1