diff --git a/src/unittest/test_voxelalgorithms.cpp b/src/unittest/test_voxelalgorithms.cpp
index 6514d3713..767e9de31 100644
--- a/src/unittest/test_voxelalgorithms.cpp
+++ b/src/unittest/test_voxelalgorithms.cpp
@@ -133,6 +133,7 @@ void TestVoxelAlgorithms::testLighting(IGameDef *gamedef)
 		map.addNodeAndUpdate(v3s16(-10, 0, 0), MapNode(CONTENT_AIR), modified_blocks);
 		map.addNodeAndUpdate(v3s16(9, 10, -9), MapNode(t_CONTENT_WATER), modified_blocks);
 		map.addNodeAndUpdate(v3s16(0, 0, 0), MapNode(t_CONTENT_TORCH), modified_blocks);
+		map.addNodeAndUpdate(v3s16(-10, 1, 0), MapNode(t_CONTENT_STONE, 153), modified_blocks);
 	}
 
 	const NodeDefManager *ndef = gamedef->ndef();
@@ -161,4 +162,9 @@ void TestVoxelAlgorithms::testLighting(IGameDef *gamedef)
 		UASSERTEQ(int, n.getLight(LIGHTBANK_NIGHT, ndef->getLightingFlags(n)), 2);
 		UASSERTEQ(int, n.getLight(LIGHTBANK_DAY, ndef->getLightingFlags(n)), 15);
 	}
+	{
+		// Test that irrelevant param1 values are not clobbered.
+		MapNode n = map.getNode(v3s16(-10, 1, 0));
+		UASSERTEQ(int, n.getParam1(), 153);
+	}
 }