diff --git a/test/MessageDigestTest.cc b/test/MessageDigestTest.cc
index 28b813942..6a2f9f1d5 100644
--- a/test/MessageDigestTest.cc
+++ b/test/MessageDigestTest.cc
@@ -42,10 +42,18 @@ void MessageDigestTest::testDigest()
   md5_->update("aria2", 5);
   CPPUNIT_ASSERT_EQUAL(std::string("2c90cadbef42945f0dcff2b959977ff8"),
                        util::toHex(md5_->digest()));
+  md5_->reset();
+  md5_->update("abc", 3);
+  CPPUNIT_ASSERT_EQUAL(std::string("900150983cd24fb0d6963f7d28e17f72"),
+                       util::toHex(md5_->digest()));
 
   sha1_->update("aria2", 5);
   CPPUNIT_ASSERT_EQUAL(std::string("f36003f22b462ffa184390533c500d8989e9f681"),
                        util::toHex(sha1_->digest()));
+  sha1_->reset();
+  sha1_->update("abc", 3);
+  CPPUNIT_ASSERT_EQUAL(std::string("a9993e364706816aba3e25717850c26c9cd0d89d"),
+                       util::toHex(sha1_->digest()));
 }
 
 void MessageDigestTest::testSupports()