diff --git a/test/old/testdir/test_plugin_zip.vim b/test/old/testdir/test_plugin_zip.vim
index ab26230cc8..04c5d0d32c 100644
--- a/test/old/testdir/test_plugin_zip.vim
+++ b/test/old/testdir/test_plugin_zip.vim
@@ -258,6 +258,7 @@ func Test_zip_fname_evil_path()
   " needed for writing the zip file
   CheckExecutable zip
 
+  messages clear
   call s:CopyZipFile("evil.zip")
   defer delete("X.zip")
   e X.zip
@@ -281,6 +282,7 @@ func Test_zip_fname_evil_path2()
   " needed for writing the zip file
   CheckExecutable zip
 
+  messages clear
   call s:CopyZipFile("evil.zip")
   defer delete("X.zip")
   e X.zip
@@ -303,6 +305,7 @@ func Test_zip_fname_evil_path3()
   " needed for writing the zip file
   CheckExecutable zip
 
+  messages clear
   call s:CopyZipFile("evil.zip")
   defer delete("X.zip")
   e X.zip
diff --git a/test/old/testdir/test_syntax.vim b/test/old/testdir/test_syntax.vim
index 36d7dc61c3..5046f56c68 100644
--- a/test/old/testdir/test_syntax.vim
+++ b/test/old/testdir/test_syntax.vim
@@ -994,9 +994,9 @@ func Test_syn_sync_grouphere_shorter_next_line()
       bar
     fi
   END
-  let lines = ['a']->repeat(50) + lines + ['a']->repeat(28 + winheight(0))
+  let lines = ['a']->repeat(50) + lines + ['a']->repeat(48)
 
-  new
+  20new
   call setline(1, lines)
   syn region shIf transparent
         \ start="\<if\_s" skip=+-fi\>+ end="\<;\_s*then\>" end="\<fi\>"