diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -656,7 +656,9 @@
     BOOST_CHECK_EQUAL(nDustThreshold, 546 * SATOSHI);
     // dust:
     t.vout[0].nValue = nDustThreshold - SATOSHI;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "dust");
     // not dust:
     t.vout[0].nValue = nDustThreshold;
     BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
@@ -666,14 +668,18 @@
     dustRelayFee = CFeeRate(1234 * SATOSHI);
     // dust:
     t.vout[0].nValue = (672 - 1) * SATOSHI;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "dust");
     // not dust:
     t.vout[0].nValue = 672 * SATOSHI;
     BOOST_CHECK(IsStandardTx(CTransaction(t), reason));
     dustRelayFee = CFeeRate(DUST_RELAY_TX_FEE);
 
     t.vout[0].scriptPubKey = CScript() << OP_1;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "scriptpubkey");
 
     // MAX_OP_RETURN_RELAY-byte TX_NULL_DATA (standard)
     t.vout[0].scriptPubKey =
@@ -705,7 +711,9 @@
                               "f5d00d4adf73f2dd112ca75cf19754651909becfbe65aed1"
                               "3afb2ab800");
     BOOST_CHECK_EQUAL(MAX_OP_RETURN_RELAY + 1, t.vout[0].scriptPubKey.size());
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "scriptpubkey");
 
     /**
      * Check when a custom value is used for -datacarriersize .
@@ -756,7 +764,9 @@
 
     // ...so long as it only contains PUSHDATA's
     t.vout[0].scriptPubKey = CScript() << OP_RETURN << OP_RETURN;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "scriptpubkey");
 
     // TX_NULL_DATA w/o PUSHDATA
     t.vout.resize(1);
@@ -773,18 +783,24 @@
         CScript() << OP_RETURN
                   << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909"
                               "a67962e0ea1f61deb649f6bc3f4cef38");
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "multi-op-return");
 
     t.vout[0].scriptPubKey =
         CScript() << OP_RETURN
                   << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909"
                               "a67962e0ea1f61deb649f6bc3f4cef38");
     t.vout[1].scriptPubKey = CScript() << OP_RETURN;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "multi-op-return");
 
     t.vout[0].scriptPubKey = CScript() << OP_RETURN;
     t.vout[1].scriptPubKey = CScript() << OP_RETURN;
+    reason.clear();
     BOOST_CHECK(!IsStandardTx(CTransaction(t), reason));
+    BOOST_CHECK_EQUAL(reason, "multi-op-return");
 }
 
 BOOST_AUTO_TEST_CASE(txsize_activation_test) {