diff --git a/tests/testpreferences.cpp b/tests/testpreferences.cpp
index 3ae38bf03..bf2f0ed74 100644
--- a/tests/testpreferences.cpp
+++ b/tests/testpreferences.cpp
@@ -24,105 +24,6 @@ void TestPreferences::testPreferences()
 	auto pref = SettingsObjectWrapper::instance();
 	pref->load();
 
-	auto tecDetails = qPrefTechnicalDetails::instance();
-	tecDetails->set_modpO2(0.2);
-	TEST(tecDetails->modpO2(), 0.2);
-	tecDetails->set_modpO2(1.0);
-	TEST(tecDetails->modpO2(), 1.0);
-
-	tecDetails->set_gflow(2);
-	TEST(tecDetails->gflow(), 2);
-	tecDetails->set_gflow(3);
-	TEST(tecDetails->gflow(), 3);
-
-	tecDetails->set_gfhigh(4);
-	TEST(tecDetails->gfhigh(), 4);
-	tecDetails->set_gfhigh(5);
-	TEST(tecDetails->gfhigh(), 5);
-
-	tecDetails->set_vpmb_conservatism(5);
-	TEST(tecDetails->vpmb_conservatism(), (short)5);
-	tecDetails->set_vpmb_conservatism(6);
-	TEST(tecDetails->vpmb_conservatism(), (short)6);
-
-	tecDetails->set_ead(true);
-	TEST(tecDetails->ead(), true);
-	tecDetails->set_mod(true);
-	TEST(tecDetails->mod(), true);
-	tecDetails->set_dcceiling(true);
-	TEST(tecDetails->dcceiling(), true);
-	tecDetails->set_redceiling(true);
-	TEST(tecDetails->redceiling(), true);
-	tecDetails->set_calcceiling(true);
-	TEST(tecDetails->calcceiling(), true);
-	tecDetails->set_calcceiling3m(true);
-	TEST(tecDetails->calcceiling3m(), true);
-	tecDetails->set_calcalltissues(true);
-	TEST(tecDetails->calcalltissues(), true);
-	tecDetails->set_calcndltts(true);
-	TEST(tecDetails->calcndltts(), true);
-	tecDetails->set_hrgraph(true);
-	TEST(tecDetails->hrgraph(), true);
-	tecDetails->set_tankbar(true);
-	TEST(tecDetails->tankbar(), true);
-	tecDetails->set_percentagegraph(true);
-	TEST(tecDetails->percentagegraph(), true);
-	tecDetails->set_rulergraph(true);
-	TEST(tecDetails->rulergraph(), true);
-	tecDetails->set_show_ccr_setpoint(true);
-	TEST(tecDetails->show_ccr_setpoint(), true);
-	tecDetails->set_show_ccr_sensors(true);
-	TEST(tecDetails->show_ccr_sensors(), true);
-	tecDetails->set_zoomed_plot(true);
-	TEST(tecDetails->zoomed_plot(), true);
-	tecDetails->set_show_sac(true);
-	TEST(tecDetails->show_sac(), true);
-	tecDetails->set_display_unused_tanks(true);
-	TEST(tecDetails->display_unused_tanks(), true);
-	tecDetails->set_show_average_depth(true);
-	TEST(tecDetails->show_average_depth(), true);
-	tecDetails->set_show_pictures_in_profile(true);
-	TEST(tecDetails->show_pictures_in_profile(), true);
-
-	tecDetails->set_ead(false);
-	TEST(tecDetails->ead(), false);
-	tecDetails->set_mod(false);
-	TEST(tecDetails->mod(), false);
-	tecDetails->set_dcceiling(false);
-	TEST(tecDetails->dcceiling(), false);
-	tecDetails->set_redceiling(false);
-	TEST(tecDetails->redceiling(), false);
-	tecDetails->set_calcceiling(false);
-	TEST(tecDetails->calcceiling(), false);
-	tecDetails->set_calcceiling3m(false);
-	TEST(tecDetails->calcceiling3m(), false);
-	tecDetails->set_calcalltissues(false);
-	TEST(tecDetails->calcalltissues(), false);
-	tecDetails->set_calcndltts(false);
-	TEST(tecDetails->calcndltts(), false);
-	tecDetails->set_hrgraph(false);
-	TEST(tecDetails->hrgraph(), false);
-	tecDetails->set_tankbar(false);
-	TEST(tecDetails->tankbar(), false);
-	tecDetails->set_percentagegraph(false);
-	TEST(tecDetails->percentagegraph(), false);
-	tecDetails->set_rulergraph(false);
-	TEST(tecDetails->rulergraph(), false);
-	tecDetails->set_show_ccr_setpoint(false);
-	TEST(tecDetails->show_ccr_setpoint(), false);
-	tecDetails->set_show_ccr_sensors(false);
-	TEST(tecDetails->show_ccr_sensors(), false);
-	tecDetails->set_zoomed_plot(false);
-	TEST(tecDetails->zoomed_plot(), false);
-	tecDetails->set_show_sac(false);
-	TEST(tecDetails->show_sac(), false);
-	tecDetails->set_display_unused_tanks(false);
-	TEST(tecDetails->display_unused_tanks(), false);
-	tecDetails->set_show_average_depth(false);
-	TEST(tecDetails->show_average_depth(), false);
-	tecDetails->set_show_pictures_in_profile(false);
-	TEST(tecDetails->show_pictures_in_profile(), false);
-
 	auto pp = pref->pp_gas;
 	pp->setShowPn2(false);
 	pp->setShowPhe(false);
diff --git a/tests/testqPrefTechnicalDetails.cpp b/tests/testqPrefTechnicalDetails.cpp
index 107e1c20b..b3abd8500 100644
--- a/tests/testqPrefTechnicalDetails.cpp
+++ b/tests/testqPrefTechnicalDetails.cpp
@@ -337,4 +337,112 @@ void TestQPrefTechnicalDetails::test_multiple()
 	QCOMPARE(tst_direct->gflow(), 25);
 }
 
+#define TEST(METHOD, VALUE)      \
+	QCOMPARE(METHOD, VALUE); \
+	tecDetails->sync();           \
+	tecDetails->load();           \
+	QCOMPARE(METHOD, VALUE);
+
+void TestQPrefTechnicalDetails::test_oldPreferences()
+{
+	auto tecDetails = qPrefTechnicalDetails::instance();
+	tecDetails->set_modpO2(0.2);
+	TEST(tecDetails->modpO2(), 0.2);
+	tecDetails->set_modpO2(1.0);
+	TEST(tecDetails->modpO2(), 1.0);
+
+	tecDetails->set_gflow(2);
+	TEST(tecDetails->gflow(), 2);
+	tecDetails->set_gflow(3);
+	TEST(tecDetails->gflow(), 3);
+
+	tecDetails->set_gfhigh(4);
+	TEST(tecDetails->gfhigh(), 4);
+	tecDetails->set_gfhigh(5);
+	TEST(tecDetails->gfhigh(), 5);
+
+	tecDetails->set_vpmb_conservatism(5);
+	TEST(tecDetails->vpmb_conservatism(), 5);
+	tecDetails->set_vpmb_conservatism(6);
+	TEST(tecDetails->vpmb_conservatism(), 6);
+
+	tecDetails->set_ead(true);
+	TEST(tecDetails->ead(), true);
+	tecDetails->set_mod(true);
+	TEST(tecDetails->mod(), true);
+	tecDetails->set_dcceiling(true);
+	TEST(tecDetails->dcceiling(), true);
+	tecDetails->set_redceiling(true);
+	TEST(tecDetails->redceiling(), true);
+	tecDetails->set_calcceiling(true);
+	TEST(tecDetails->calcceiling(), true);
+	tecDetails->set_calcceiling3m(true);
+	TEST(tecDetails->calcceiling3m(), true);
+	tecDetails->set_calcalltissues(true);
+	TEST(tecDetails->calcalltissues(), true);
+	tecDetails->set_calcndltts(true);
+	TEST(tecDetails->calcndltts(), true);
+	tecDetails->set_hrgraph(true);
+	TEST(tecDetails->hrgraph(), true);
+	tecDetails->set_tankbar(true);
+	TEST(tecDetails->tankbar(), true);
+	tecDetails->set_percentagegraph(true);
+	TEST(tecDetails->percentagegraph(), true);
+	tecDetails->set_rulergraph(true);
+	TEST(tecDetails->rulergraph(), true);
+	tecDetails->set_show_ccr_setpoint(true);
+	TEST(tecDetails->show_ccr_setpoint(), true);
+	tecDetails->set_show_ccr_sensors(true);
+	TEST(tecDetails->show_ccr_sensors(), true);
+	tecDetails->set_zoomed_plot(true);
+	TEST(tecDetails->zoomed_plot(), true);
+	tecDetails->set_show_sac(true);
+	TEST(tecDetails->show_sac(), true);
+	tecDetails->set_display_unused_tanks(true);
+	TEST(tecDetails->display_unused_tanks(), true);
+	tecDetails->set_show_average_depth(true);
+	TEST(tecDetails->show_average_depth(), true);
+	tecDetails->set_show_pictures_in_profile(true);
+	TEST(tecDetails->show_pictures_in_profile(), true);
+
+	tecDetails->set_ead(false);
+	TEST(tecDetails->ead(), false);
+	tecDetails->set_mod(false);
+	TEST(tecDetails->mod(), false);
+	tecDetails->set_dcceiling(false);
+	TEST(tecDetails->dcceiling(), false);
+	tecDetails->set_redceiling(false);
+	TEST(tecDetails->redceiling(), false);
+	tecDetails->set_calcceiling(false);
+	TEST(tecDetails->calcceiling(), false);
+	tecDetails->set_calcceiling3m(false);
+	TEST(tecDetails->calcceiling3m(), false);
+	tecDetails->set_calcalltissues(false);
+	TEST(tecDetails->calcalltissues(), false);
+	tecDetails->set_calcndltts(false);
+	TEST(tecDetails->calcndltts(), false);
+	tecDetails->set_hrgraph(false);
+	TEST(tecDetails->hrgraph(), false);
+	tecDetails->set_tankbar(false);
+	TEST(tecDetails->tankbar(), false);
+	tecDetails->set_percentagegraph(false);
+	TEST(tecDetails->percentagegraph(), false);
+	tecDetails->set_rulergraph(false);
+	TEST(tecDetails->rulergraph(), false);
+	tecDetails->set_show_ccr_setpoint(false);
+	TEST(tecDetails->show_ccr_setpoint(), false);
+	tecDetails->set_show_ccr_sensors(false);
+	TEST(tecDetails->show_ccr_sensors(), false);
+	tecDetails->set_zoomed_plot(false);
+	TEST(tecDetails->zoomed_plot(), false);
+	tecDetails->set_show_sac(false);
+	TEST(tecDetails->show_sac(), false);
+	tecDetails->set_display_unused_tanks(false);
+	TEST(tecDetails->display_unused_tanks(), false);
+	tecDetails->set_show_average_depth(false);
+	TEST(tecDetails->show_average_depth(), false);
+	tecDetails->set_show_pictures_in_profile(false);
+	TEST(tecDetails->show_pictures_in_profile(), false);
+}
+
 QTEST_MAIN(TestQPrefTechnicalDetails)
diff --git a/tests/testqPrefTechnicalDetails.h b/tests/testqPrefTechnicalDetails.h
index 8e935a621..41471cafa 100644
--- a/tests/testqPrefTechnicalDetails.h
+++ b/tests/testqPrefTechnicalDetails.h
@@ -14,6 +14,7 @@ private slots:
 	void test_set_load_struct();
 	void test_struct_disk();
 	void test_multiple();
+	void test_oldPreferences();
 };
 
 #endif // TESTQPREFTECHNICALDETAILS_H