diff --git a/src/test/storm-pars/analysis/LatticeTest.cpp b/src/test/storm-pars/analysis/LatticeTest.cpp
index 14cd55c38..14a02675c 100644
--- a/src/test/storm-pars/analysis/LatticeTest.cpp
+++ b/src/test/storm-pars/analysis/LatticeTest.cpp
@@ -51,6 +51,10 @@ TEST(LatticeTest, Simple) {
     EXPECT_EQ(storm::analysis::Lattice::ABOVE, lattice.compare(6,3));
     EXPECT_EQ(storm::analysis::Lattice::UNKNOWN, lattice.compare(6,4));
     EXPECT_EQ(storm::analysis::Lattice::BELOW, lattice.compare(6,5));
+
+    lattice.addRelationNodes(lattice.getNode(6), lattice.getNode(4));
+    EXPECT_EQ(storm::analysis::Lattice::ABOVE, lattice.compare(6,4));
+
 }
 
 TEST(LatticeTest, copy_lattice) {
@@ -68,6 +72,7 @@ TEST(LatticeTest, copy_lattice) {
     lattice.addBetween(6, lattice.getNode(5), lattice.getNode(3));
 
 
+
     auto latticeCopy = storm::analysis::Lattice(lattice);
     EXPECT_EQ(storm::analysis::Lattice::ABOVE, latticeCopy.compare(0,1));
     EXPECT_EQ(storm::analysis::Lattice::BELOW, latticeCopy.compare(1,0));
@@ -90,10 +95,12 @@ TEST(LatticeTest, copy_lattice) {
     EXPECT_EQ(storm::analysis::Lattice::UNKNOWN, latticeCopy.compare(5,2));
     EXPECT_EQ(storm::analysis::Lattice::UNKNOWN, latticeCopy.compare(5,4));
 
+    lattice.addRelationNodes(lattice.getNode(6), lattice.getNode(4));
+    latticeCopy = storm::analysis::Lattice(lattice);
     EXPECT_EQ(storm::analysis::Lattice::BELOW, latticeCopy.compare(6,0));
     EXPECT_EQ(storm::analysis::Lattice::ABOVE, latticeCopy.compare(6,1));
-    EXPECT_EQ(storm::analysis::Lattice::UNKNOWN, latticeCopy.compare(6,2));
+    EXPECT_EQ(storm::analysis::Lattice::ABOVE, latticeCopy.compare(6,2));
     EXPECT_EQ(storm::analysis::Lattice::ABOVE, latticeCopy.compare(6,3));
-    EXPECT_EQ(storm::analysis::Lattice::UNKNOWN, latticeCopy.compare(6,4));
+    EXPECT_EQ(storm::analysis::Lattice::ABOVE, latticeCopy.compare(6,4));
     EXPECT_EQ(storm::analysis::Lattice::BELOW, latticeCopy.compare(6,5));
-}
\ No newline at end of file
+}