diff --git a/src/test/DoS_tests.cpp b/src/test/DoS_tests.cpp
index 93f7ae09d..a8c5f95ac 100644
--- a/src/test/DoS_tests.cpp
+++ b/src/test/DoS_tests.cpp
@@ -148,7 +148,7 @@ BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
         tx.vout.resize(1);
         tx.vout[0].nValue = 1*CENT;
         tx.vout[0].scriptPubKey = GetScriptForDestination(key.GetPubKey().GetID());
-        SignSignature(keystore, txPrev, tx, 0);
+        SignSignature(keystore, txPrev, tx, 0, SIGHASH_ALL);
 
         AddOrphanTx(tx, i);
     }
@@ -168,7 +168,7 @@ BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
             tx.vin[j].prevout.n = j;
             tx.vin[j].prevout.hash = txPrev.GetHash();
         }
-        SignSignature(keystore, txPrev, tx, 0);
+        SignSignature(keystore, txPrev, tx, 0, SIGHASH_ALL);
         // Re-use same signature for other inputs
         // (they don't have to be valid for this test)
         for (unsigned int j = 1; j < tx.vin.size(); j++)
diff --git a/src/test/multisig_tests.cpp b/src/test/multisig_tests.cpp
index cd6092b15..ad16ca508 100644
--- a/src/test/multisig_tests.cpp
+++ b/src/test/multisig_tests.cpp
@@ -306,7 +306,7 @@ BOOST_AUTO_TEST_CASE(multisig_Sign)
 
     for (int i = 0; i < 3; i++)
     {
-        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
+        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0, SIGHASH_ALL), strprintf("SignSignature %d", i));
     }
 }
 
diff --git a/src/test/script_P2SH_tests.cpp b/src/test/script_P2SH_tests.cpp
index dd71f1cfc..9bb8f324d 100644
--- a/src/test/script_P2SH_tests.cpp
+++ b/src/test/script_P2SH_tests.cpp
@@ -2,6 +2,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include "core_io.h"
 #include "key.h"
 #include "keystore.h"
 #include "main.h"
@@ -102,7 +103,7 @@ BOOST_AUTO_TEST_CASE(sign)
     }
     for (int i = 0; i < 8; i++)
     {
-        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
+        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0, SIGHASH_ALL), strprintf("SignSignature %d", i));
     }
     // All of the above should be OK, and the txTos have valid signatures
     // Check to make sure signature verification fails if we use the wrong ScriptSig:
@@ -199,7 +200,7 @@ BOOST_AUTO_TEST_CASE(set)
     }
     for (int i = 0; i < 4; i++)
     {
-        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0), strprintf("SignSignature %d", i));
+        BOOST_CHECK_MESSAGE(SignSignature(keystore, txFrom, txTo[i], 0, SIGHASH_ALL), strprintf("SignSignature %d", i));
         BOOST_CHECK_MESSAGE(IsStandardTx(txTo[i], reason), strprintf("txTo[%d].IsStandard", i));
     }
 }
@@ -328,9 +329,9 @@ BOOST_AUTO_TEST_CASE(AreInputsStandard)
         txTo.vin[i].prevout.n = i;
         txTo.vin[i].prevout.hash = txFrom.GetHash();
     }
-    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 0));
-    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 1));
-    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 2));
+    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL));
+    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 1, SIGHASH_ALL));
+    BOOST_CHECK(SignSignature(keystore, txFrom, txTo, 2, SIGHASH_ALL));
     // SignSignature doesn't know how to sign these. We're
     // not testing validating signatures, so just create
     // dummy signatures that DO include the correct P2SH scripts:
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index 637cdb68d..22a3b7e0c 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -891,6 +891,7 @@ BOOST_AUTO_TEST_CASE(script_CHECKMULTISIG23)
 BOOST_AUTO_TEST_CASE(script_combineSigs)
 {
     // Test the CombineSignatures function
+    CAmount amount = 0;
     CBasicKeyStore keystore;
     vector<CKey> keys;
     vector<CPubKey> pubkeys;
@@ -913,10 +914,10 @@ BOOST_AUTO_TEST_CASE(script_combineSigs)
     BOOST_CHECK(combined.empty());
 
     // Single signature case:
-    SignSignature(keystore, txFrom, txTo, 0); // changes scriptSig
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
+    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL); // changes scriptSig
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSig, empty);
     BOOST_CHECK(combined == scriptSig);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, scriptSig);
     BOOST_CHECK(combined == scriptSig);
     CScript scriptSigCopy = scriptSig;
     // Signing again will give a different, valid signature:
@@ -928,29 +929,29 @@ BOOST_AUTO_TEST_CASE(script_combineSigs)
     CScript pkSingle; pkSingle << ToByteVector(keys[0].GetPubKey()) << OP_CHECKSIG;
     keystore.AddCScript(pkSingle);
     scriptPubKey = GetScriptForDestination(CScriptID(pkSingle));
-    SignSignature(keystore, txFrom, txTo, 0);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
+    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSig, empty);
     BOOST_CHECK(combined == scriptSig);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, scriptSig);
     BOOST_CHECK(combined == scriptSig);
     scriptSigCopy = scriptSig;
-    SignSignature(keystore, txFrom, txTo, 0);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
+    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSigCopy, scriptSig);
     BOOST_CHECK(combined == scriptSigCopy || combined == scriptSig);
     // dummy scriptSigCopy with placeholder, should always choose non-placeholder:
     scriptSigCopy = CScript() << OP_0 << vector<unsigned char>(pkSingle.begin(), pkSingle.end());
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSigCopy, scriptSig);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSigCopy, scriptSig);
     BOOST_CHECK(combined == scriptSig);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, scriptSigCopy);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSig, scriptSigCopy);
     BOOST_CHECK(combined == scriptSig);
 
     // Hardest case:  Multisig 2-of-3
     scriptPubKey = GetScriptForMultisig(2, pubkeys);
     keystore.AddCScript(scriptPubKey);
-    SignSignature(keystore, txFrom, txTo, 0);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, scriptSig, empty);
+    SignSignature(keystore, txFrom, txTo, 0, SIGHASH_ALL);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), scriptSig, empty);
     BOOST_CHECK(combined == scriptSig);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, empty, scriptSig);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), empty, scriptSig);
     BOOST_CHECK(combined == scriptSig);
 
     // A couple of partially-signed versions:
@@ -979,21 +980,21 @@ BOOST_AUTO_TEST_CASE(script_combineSigs)
     CScript complete13 = CScript() << OP_0 << sig1 << sig3;
     CScript complete23 = CScript() << OP_0 << sig2 << sig3;
 
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial1a, partial1b);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial1a, partial1b);
     BOOST_CHECK(combined == partial1a);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial1a, partial2a);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial1a, partial2a);
     BOOST_CHECK(combined == complete12);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial2a, partial1a);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial2a, partial1a);
     BOOST_CHECK(combined == complete12);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial1b, partial2b);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial1b, partial2b);
     BOOST_CHECK(combined == complete12);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial1b);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial3b, partial1b);
     BOOST_CHECK(combined == complete13);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial2a, partial3a);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial2a, partial3a);
     BOOST_CHECK(combined == complete23);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial2b);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial3b, partial2b);
     BOOST_CHECK(combined == complete23);
-    combined = CombineSignatures(scriptPubKey, txTo, 0, partial3b, partial3a);
+    combined = CombineSignatures(scriptPubKey, MutableTransactionSignatureChecker(&txTo, 0, amount), partial3b, partial3a);
     BOOST_CHECK(combined == partial3c);
 }