diff --git a/src/testdir/test_assert.vim b/src/testdir/test_assert.vim
index 04fde2d..04bd877 100644
--- a/src/testdir/test_assert.vim
+++ b/src/testdir/test_assert.vim
@@ -6,11 +6,11 @@
   call assert_equal(0, v:false->assert_false())
 
   call assert_equal(1, assert_false(123))
-  call assert_match("Expected False but got 123", v:errors[0])
+  call assert_match("Expected 'False' but got 123", v:errors[0])
   call remove(v:errors, 0)
 
   call assert_equal(1, 123->assert_false())
-  call assert_match("Expected False but got 123", v:errors[0])
+  call assert_match("Expected 'False' but got 123", v:errors[0])
   call remove(v:errors, 0)
 endfunc
 
@@ -21,11 +21,11 @@
   call assert_equal(0, v:true->assert_true())
 
   call assert_equal(1, assert_true(0))
-  call assert_match("Expected True but got 0", v:errors[0])
+  call assert_match("Expected 'True' but got 0", v:errors[0])
   call remove(v:errors, 0)
 
   call assert_equal(1, 0->assert_true())
-  call assert_match("Expected True but got 0", v:errors[0])
+  call assert_match("Expected 'True' but got 0", v:errors[0])
   call remove(v:errors, 0)
 endfunc
 
@@ -234,11 +234,11 @@
   call remove(v:errors, 0)
 
   call assert_equal(1, assert_fails('xxx', ['E9876']))
-  call assert_match("Expected \\['E9876'\\] but got 'E492:", v:errors[0])
+  call assert_match("Expected 'E9876' but got 'E492:", v:errors[0])
   call remove(v:errors, 0)
 
   call assert_equal(1, assert_fails('xxx', ['E492:', 'E9876']))
-  call assert_match("Expected \\['E492:', 'E9876'\\] but got 'E492:", v:errors[0])
+  call assert_match("Expected 'E9876' but got 'E492:", v:errors[0])
   call remove(v:errors, 0)
 
   call assert_equal(1, assert_fails('echo', '', 'echo command'))
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 38f24d3..ea9c7c6 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -2859,6 +2859,28 @@
   unlet g:caught
 enddef
 
+def Test_no_unknown_error_after_error()
+  if !has('unix') || !has('job')
+    throw 'Skipped: not unix of missing +job feature'
+  endif
+  var lines =<< trim END
+      vim9script
+      var source: list<number>
+      def Out_cb(...l: any)
+          eval [][0]
+      enddef
+      def Exit_cb(...l: any)
+          sleep 1m
+          source += l
+      enddef
+      var myjob = job_start('echo burp', #{out_cb: Out_cb, exit_cb: Exit_cb, mode: 'raw'})
+      sleep 100m
+  END
+  writefile(lines, 'Xdef')
+  assert_fails('so Xdef', ['E684:', 'E1012:'])
+  delete('Xdef')
+enddef
+
 def Test_put_with_linebreak()
   new
   var lines =<< trim END