diff --git a/src/test/dos_tests.cpp b/src/test/dos_tests.cpp
index ece6bbb389..ff7ec22e75 100755
--- a/src/test/dos_tests.cpp
+++ b/src/test/dos_tests.cpp
@@ -203,91 +203,4 @@ BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
     BOOST_CHECK(mapOrphanTransactionsByPrev.empty());
 }
 
-BOOST_AUTO_TEST_CASE(DoS_checkSig)
-{
-    // Test signature caching code (see key.cpp Verify() methods)
-
-    CKey key;
-    key.MakeNewKey(true);
-    CBasicKeyStore keystore;
-    BOOST_CHECK(keystore.AddKey(key));
-
-    // 100 orphan transactions:
-    static const int NPREV=100;
-    CTransaction orphans[NPREV];
-    for (int i = 0; i < NPREV; i++)
-    {
-        CTransaction& tx = orphans[i];
-        tx.vin.resize(1);
-        tx.vin[0].prevout.n = 0;
-        tx.vin[0].prevout.hash = InsecureRand256();
-        tx.vin[0].scriptSig << OP_1;
-        tx.vout.resize(1);
-        tx.vout[0].nValue = 1*CENT;
-        tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
-        AddOrphanTx(tx);
-    }
-
-    // Create a transaction that depends on orphans:
-    CTransaction tx;
-    tx.vout.resize(1);
-    tx.vout[0].nValue = 1*CENT;
-    tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
-    tx.vin.resize(NPREV);
-    for (unsigned int j = 0; j < tx.vin.size(); j++)
-    {
-        tx.vin[j].prevout.n = 0;
-        tx.vin[j].prevout.hash = orphans[j].GetHash();
-    }
-    // Creating signatures primes the cache:
-    boost::posix_time::ptime mst1 = boost::posix_time::microsec_clock::local_time();
-    for (unsigned int j = 0; j < tx.vin.size(); j++)
-        BOOST_CHECK(SignSignature(keystore, orphans[j], tx, j));
-    boost::posix_time::ptime mst2 = boost::posix_time::microsec_clock::local_time();
-    boost::posix_time::time_duration msdiff = mst2 - mst1;
-    long nOneValidate = msdiff.total_milliseconds();
-    LogPrint(BCLog::LogFlags::VERBOSE, "DoS_Checksig sign: %ld", nOneValidate);
-
-    // ... now validating repeatedly should be quick:
-    // 2.8GHz machine, -g build: Sign takes ~760ms,
-    // uncached Verify takes ~250ms, cached Verify takes ~50ms
-    // (for 100 single-signature inputs)
-    mst1 = boost::posix_time::microsec_clock::local_time();
-    for (unsigned int i = 0; i < 5; i++)
-        for (unsigned int j = 0; j < tx.vin.size(); j++)
-            BOOST_CHECK(VerifySignature(orphans[j], tx, j, SIGHASH_ALL));
-    mst2 = boost::posix_time::microsec_clock::local_time();
-    msdiff = mst2 - mst1;
-    long nManyValidate = msdiff.total_milliseconds();
-    LogPrint(BCLog::LogFlags::VERBOSE, "DoS_Checksig five: %ld", nManyValidate);
-
-    BOOST_CHECK_MESSAGE(nManyValidate < nOneValidate, "Signature cache timing failed");
-
-    // Empty a signature, validation should fail:
-    CScript save = tx.vin[0].scriptSig;
-    tx.vin[0].scriptSig = CScript();
-    BOOST_CHECK(!VerifySignature(orphans[0], tx, 0, SIGHASH_ALL));
-    tx.vin[0].scriptSig = save;
-
-    // Swap signatures, validation should fail:
-    std::swap(tx.vin[0].scriptSig, tx.vin[1].scriptSig);
-    BOOST_CHECK(!VerifySignature(orphans[0], tx, 0, SIGHASH_ALL));
-    BOOST_CHECK(!VerifySignature(orphans[1], tx, 1, SIGHASH_ALL));
-    std::swap(tx.vin[0].scriptSig, tx.vin[1].scriptSig);
-
-#if 0
-    // Exercise -maxsigcachesize code:
-    gArgs.ForceSetArg("-maxsigcachesize","10");
-    // Generate a new, different signature for vin[0] to trigger cache clear:
-    CScript oldSig = tx.vin[0].scriptSig;
-    BOOST_CHECK(SignSignature(keystore, orphans[0], tx, 0));
-    BOOST_CHECK(tx.vin[0].scriptSig != oldSig);
-    for (unsigned int j = 0; j < tx.vin.size(); j++)
-        BOOST_CHECK(VerifySignature(orphans[j], tx, j, SIGHASH_ALL));
-    gArgs.ForceSetArg("-maxsigcachesize", "50000");
-#endif
-
-    LimitOrphanTxSize(0);
-}
-
 BOOST_AUTO_TEST_SUITE_END()