diff --git a/src/testdir/test_sha256.vim b/src/testdir/test_sha256.vim
index d0f92b1..f6f430b 100644
--- a/src/testdir/test_sha256.vim
+++ b/src/testdir/test_sha256.vim
@@ -6,17 +6,17 @@
 
 function Test_sha256()
   " test for empty string:
-  call assert_equal(sha256(""), 'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855')
+  call assert_equal('e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855', sha256(""))
 
   "'test for 1 char:
-  call assert_equal(sha256("a"), 'ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb')
+  call assert_equal('ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb', sha256("a"))
   "
   "test for 3 chars:
-  call assert_equal(sha256("abc"), 'ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad')
+  call assert_equal('ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad', "abc"->sha256())
 
   " test for contains meta char:
-  call assert_equal(sha256("foo\nbar"), '807eff6267f3f926a21d234f7b0cf867a86f47e07a532f15e8cc39ed110ca776')
+  call assert_equal('807eff6267f3f926a21d234f7b0cf867a86f47e07a532f15e8cc39ed110ca776', sha256("foo\nbar"))
 
   " test for contains non-ascii char:
-  call assert_equal(sha256("\xde\xad\xbe\xef"), '5f78c33274e43fa9de5659265c1d917e25c03722dcb0b8d27db8d5feaa813953')
+  call assert_equal('5f78c33274e43fa9de5659265c1d917e25c03722dcb0b8d27db8d5feaa813953', sha256("\xde\xad\xbe\xef"))
 endfunction