diff --git a/tests/testpreferences.cpp b/tests/testpreferences.cpp
index b22fb4e48..d1d0012fa 100644
--- a/tests/testpreferences.cpp
+++ b/tests/testpreferences.cpp
@@ -201,6 +201,36 @@ void TestPreferences::testPreferences()
 	TEST(tecDetails->showAverageDepth(), false);
 	tecDetails->setShowPicturesInProfile(false);
 	TEST(tecDetails->showPicturesInProfile(), false);
+
+	auto pp = pref->pp_gas;
+	pp->setShowPn2(1);
+	pp->setShowPhe(2);
+	pp->setShowPo2(3);
+	pp->setPo2Threshold(1.0);
+	pp->setPn2Threshold(2.0);
+	pp->setPheThreshold(3.0);
+
+	TEST(pp->showPn2(), (short) 1);
+	TEST(pp->showPhe(), (short) 2);
+	TEST(pp->showPo2(), (short) 3);
+	TEST(pp->pn2Threshold(), 1.0);
+	TEST(pp->pheThreshold(), 2.0);
+	TEST(pp->po2Threshold(), 3.0);
+
+	pp->setShowPn2(4);
+	pp->setShowPhe(5);
+	pp->setShowPo2(6);
+	pp->setPo2Threshold(4.0);
+	pp->setPn2Threshold(5.0);
+	pp->setPheThreshold(6.0);
+
+	TEST(pp->showPn2(), (short) 4);
+	TEST(pp->showPhe(), (short) 5);
+	TEST(pp->showPo2(), (short) 6);
+	TEST(pp->pn2Threshold(), 4.0);
+	TEST(pp->pheThreshold(), 5.0);
+	TEST(pp->po2Threshold(), 6.0);
+
 }
 
 QTEST_MAIN(TestPreferences)