diff --git a/src/Makefile.qttest.include b/src/Makefile.qttest.include
index 0e3842000..52604daf0 100644
--- a/src/Makefile.qttest.include
+++ b/src/Makefile.qttest.include
@@ -7,6 +7,7 @@ TESTS += qt/test/test_bitcoin-qt
 
 TEST_QT_MOC_CPP = \
   qt/test/moc_bitcoinaddressvalidatortests.cpp \
+  qt/test/moc_compattests.cpp \
   qt/test/moc_guiutiltests.cpp \
   qt/test/moc_uritests.cpp
 
@@ -16,6 +17,7 @@ endif
 
 TEST_QT_H = \
   qt/test/bitcoinaddressvalidatortests.h \
+  qt/test/compattests.h \
   qt/test/guiutiltests.h \
   qt/test/uritests.h \
   qt/test/paymentrequestdata.h \
@@ -26,6 +28,7 @@ qt_test_test_bitcoin_qt_CPPFLAGS = $(AM_CPPFLAGS) $(BITCOIN_INCLUDES) $(BITCOIN_
 
 qt_test_test_bitcoin_qt_SOURCES = \
   qt/test/bitcoinaddressvalidatortests.cpp \
+  qt/test/compattests.cpp \
   qt/test/guiutiltests.cpp \
   qt/test/test_main.cpp \
   qt/test/uritests.cpp \
diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index 5c0d9def8..f75d13ba7 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -47,6 +47,7 @@ BITCOIN_TESTS =\
   test/bip32_tests.cpp \
   test/blockencodings_tests.cpp \
   test/bloom_tests.cpp \
+  test/bswap_tests.cpp \
   test/checkblock_tests.cpp \
   test/cashaddr_tests.cpp \
   test/cashaddrenc_tests.cpp \
diff --git a/src/qt/test/compattests.cpp b/src/qt/test/compattests.cpp
new file mode 100644
index 000000000..2a7284b5b
--- /dev/null
+++ b/src/qt/test/compattests.cpp
@@ -0,0 +1,23 @@
+// Copyright (c) 2016 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "paymentrequestplus.h" // this includes protobuf's port.h which defines its own bswap macos
+
+#include "compattests.h"
+
+#include "compat/byteswap.h"
+
+void CompatTests::bswapTests()
+{
+	// Sibling in bitcoin/src/test/bswap_tests.cpp
+	uint16_t u1 = 0x1234;
+	uint32_t u2 = 0x56789abc;
+	uint64_t u3 = 0xdef0123456789abc;
+	uint16_t e1 = 0x3412;
+	uint32_t e2 = 0xbc9a7856;
+	uint64_t e3 = 0xbc9a78563412f0de;
+	QVERIFY(bswap_16(u1) == e1);
+	QVERIFY(bswap_32(u2) == e2);
+	QVERIFY(bswap_64(u3) == e3);
+}
diff --git a/src/qt/test/compattests.h b/src/qt/test/compattests.h
new file mode 100644
index 000000000..35dede774
--- /dev/null
+++ b/src/qt/test/compattests.h
@@ -0,0 +1,19 @@
+// Copyright (c) 2009-2015 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QT_TEST_COMPATTESTS_H
+#define BITCOIN_QT_TEST_COMPATTESTS_H
+
+#include <QObject>
+#include <QTest>
+
+class CompatTests : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void bswapTests();
+};
+
+#endif // BITCOIN_QT_TEST_COMPATTESTS_H
diff --git a/src/qt/test/test_main.cpp b/src/qt/test/test_main.cpp
index fa5f5ddbf..8675656b6 100644
--- a/src/qt/test/test_main.cpp
+++ b/src/qt/test/test_main.cpp
@@ -10,6 +10,7 @@
 #include "guiutiltests.h"
 #include "util.h"
 #include "uritests.h"
+#include "compattests.h"
 
 #ifdef ENABLE_WALLET
 #include "paymentservertests.h"
@@ -50,6 +51,9 @@ int main(int argc, char *argv[])
     if (QTest::qExec(&test2) != 0)
         fInvalid = true;
 #endif
+    CompatTests test4;
+    if (QTest::qExec(&test4) != 0)
+        fInvalid = true;
     GUIUtilTests test5;
     if (QTest::qExec(&test5) != 0) fInvalid = true;
     BitcoinAddressValidatorTests test6;
diff --git a/src/test/bswap_tests.cpp b/src/test/bswap_tests.cpp
new file mode 100644
index 000000000..7b3134d32
--- /dev/null
+++ b/src/test/bswap_tests.cpp
@@ -0,0 +1,26 @@
+// Copyright (c) 2016 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "compat/byteswap.h"
+#include "test/test_bitcoin.h"
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_FIXTURE_TEST_SUITE(bswap_tests, BasicTestingSetup)
+
+BOOST_AUTO_TEST_CASE(bswap_tests)
+{
+	// Sibling in bitcoin/src/qt/test/compattests.cpp
+	uint16_t u1 = 0x1234;
+	uint32_t u2 = 0x56789abc;
+	uint64_t u3 = 0xdef0123456789abc;
+	uint16_t e1 = 0x3412;
+	uint32_t e2 = 0xbc9a7856;
+	uint64_t e3 = 0xbc9a78563412f0de;
+	BOOST_CHECK(bswap_16(u1) == e1);
+	BOOST_CHECK(bswap_32(u2) == e2);
+	BOOST_CHECK(bswap_64(u3) == e3);
+}
+
+BOOST_AUTO_TEST_SUITE_END()