diff --git a/src/testdir/test_checkpath.vim b/src/testdir/test_checkpath.vim
index f6a3bbc..ddc3add 100644
--- a/src/testdir/test_checkpath.vim
+++ b/src/testdir/test_checkpath.vim
@@ -2,28 +2,28 @@
 
 " Test for 'include' without \zs or \ze
 func Test_checkpath1()
-  call mkdir("Xdir1/dir2", "p")
-  call writefile(['#include    "bar.a"'], 'Xdir1/dir2/foo.a')
-  call writefile(['#include    "baz.a"'], 'Xdir1/dir2/bar.a')
-  call writefile(['#include    "foo.a"'], 'Xdir1/dir2/baz.a')
+  call mkdir("Xcheckdir1/dir2", "p")
+  call writefile(['#include    "bar.a"'], 'Xcheckdir1/dir2/foo.a')
+  call writefile(['#include    "baz.a"'], 'Xcheckdir1/dir2/bar.a')
+  call writefile(['#include    "foo.a"'], 'Xcheckdir1/dir2/baz.a')
   call writefile(['#include    <foo.a>'], 'Xbase.a')
 
   edit Xbase.a
-  set path=Xdir1/dir2
+  set path=Xcheckdir1/dir2
   let res = split(execute("checkpath!"), "\n")
   call assert_equal([
 	      \ '--- Included files in path ---',
-	      \ 'Xdir1/dir2/foo.a',
-	      \ 'Xdir1/dir2/foo.a -->',
-	      \ '  Xdir1/dir2/bar.a',
-	      \ '  Xdir1/dir2/bar.a -->',
-	      \ '    Xdir1/dir2/baz.a',
-	      \ '    Xdir1/dir2/baz.a -->',
+	      \ 'Xcheckdir1/dir2/foo.a',
+	      \ 'Xcheckdir1/dir2/foo.a -->',
+	      \ '  Xcheckdir1/dir2/bar.a',
+	      \ '  Xcheckdir1/dir2/bar.a -->',
+	      \ '    Xcheckdir1/dir2/baz.a',
+	      \ '    Xcheckdir1/dir2/baz.a -->',
 	      \ '      "foo.a"  (Already listed)'], res)
 
   enew
   call delete("./Xbase.a")
-  call delete("Xdir1", "rf")
+  call delete("Xcheckdir1", "rf")
   set path&
 endfunc
 
@@ -33,31 +33,31 @@
 
 " Test for 'include' with \zs and \ze
 func Test_checkpath2()
-  call mkdir("Xdir1/dir2", "p")
-  call writefile(['%inc    /bar/'], 'Xdir1/dir2/foo.b')
-  call writefile(['%inc    /baz/'], 'Xdir1/dir2/bar.b')
-  call writefile(['%inc    /foo/'], 'Xdir1/dir2/baz.b')
+  call mkdir("Xcheckdir2/dir2", "p")
+  call writefile(['%inc    /bar/'], 'Xcheckdir2/dir2/foo.b')
+  call writefile(['%inc    /baz/'], 'Xcheckdir2/dir2/bar.b')
+  call writefile(['%inc    /foo/'], 'Xcheckdir2/dir2/baz.b')
   call writefile(['%inc    /foo/'], 'Xbase.b')
 
   let &include='^\s*%inc\s*/\zs[^/]\+\ze'
   let &includeexpr='DotsToSlashes()'
 
   edit Xbase.b
-  set path=Xdir1/dir2
+  set path=Xcheckdir2/dir2
   let res = split(execute("checkpath!"), "\n")
   call assert_equal([
 	      \ '--- Included files in path ---',
-	      \ 'Xdir1/dir2/foo.b',
-	      \ 'Xdir1/dir2/foo.b -->',
-	      \ '  Xdir1/dir2/bar.b',
-	      \ '  Xdir1/dir2/bar.b -->',
-	      \ '    Xdir1/dir2/baz.b',
-	      \ '    Xdir1/dir2/baz.b -->',
+	      \ 'Xcheckdir2/dir2/foo.b',
+	      \ 'Xcheckdir2/dir2/foo.b -->',
+	      \ '  Xcheckdir2/dir2/bar.b',
+	      \ '  Xcheckdir2/dir2/bar.b -->',
+	      \ '    Xcheckdir2/dir2/baz.b',
+	      \ '    Xcheckdir2/dir2/baz.b -->',
 	      \ '      foo  (Already listed)'], res)
 
   enew
   call delete("./Xbase.b")
-  call delete("Xdir1", "rf")
+  call delete("Xcheckdir2", "rf")
   set path&
   set include&
   set includeexpr&
@@ -72,32 +72,32 @@
 
 " Test for 'include' with \zs and no \ze
 func Test_checkpath3()
-  call mkdir("Xdir1/dir2", "p")
-  call writefile(['%inc    bar.c'], 'Xdir1/dir2/foo.c')
-  call writefile(['%inc    baz.c'], 'Xdir1/dir2/bar.c')
-  call writefile(['%inc    foo.c'], 'Xdir1/dir2/baz.c')
-  call writefile(['%inc    foo.c'], 'Xdir1/dir2/FALSE.c')
+  call mkdir("Xcheckdir3/dir2", "p")
+  call writefile(['%inc    bar.c'], 'Xcheckdir3/dir2/foo.c')
+  call writefile(['%inc    baz.c'], 'Xcheckdir3/dir2/bar.c')
+  call writefile(['%inc    foo.c'], 'Xcheckdir3/dir2/baz.c')
+  call writefile(['%inc    foo.c'], 'Xcheckdir3/dir2/FALSE.c')
   call writefile(['%inc    FALSE.c foo.c'], 'Xbase.c')
 
   let &include='^\s*%inc\s*\%([[:upper:]][^[:space:]]*\s\+\)\?\zs\S\+\ze'
   let &includeexpr='StripNewlineChar()'
 
   edit Xbase.c
-  set path=Xdir1/dir2
+  set path=Xcheckdir3/dir2
   let res = split(execute("checkpath!"), "\n")
   call assert_equal([
 	      \ '--- Included files in path ---',
-	      \ 'Xdir1/dir2/foo.c',
-	      \ 'Xdir1/dir2/foo.c -->',
-	      \ '  Xdir1/dir2/bar.c',
-	      \ '  Xdir1/dir2/bar.c -->',
-	      \ '    Xdir1/dir2/baz.c',
-	      \ '    Xdir1/dir2/baz.c -->',
+	      \ 'Xcheckdir3/dir2/foo.c',
+	      \ 'Xcheckdir3/dir2/foo.c -->',
+	      \ '  Xcheckdir3/dir2/bar.c',
+	      \ '  Xcheckdir3/dir2/bar.c -->',
+	      \ '    Xcheckdir3/dir2/baz.c',
+	      \ '    Xcheckdir3/dir2/baz.c -->',
 	      \ '      foo.c  (Already listed)'], res)
 
   enew
   call delete("./Xbase.c")
-  call delete("Xdir1", "rf")
+  call delete("Xcheckdir3", "rf")
   set path&
   set include&
   set includeexpr&