diff --git a/tests/sdf/test_sdf_operations.cpp b/tests/sdf/test_sdf_operations.cpp
index 1ca1401..e252495 100644
--- a/tests/sdf/test_sdf_operations.cpp
+++ b/tests/sdf/test_sdf_operations.cpp
@@ -43,7 +43,7 @@ TEST(SdfOperations, Difference) {
     EXPECT_DOUBLE_EQ(op_difference(1.0, 2.0), 2.0);   // -d1=-1, max(-1,2)=2
     EXPECT_DOUBLE_EQ(op_difference(3.0, 2.0), 2.0);   // max(-3,2)=2
     EXPECT_DOUBLE_EQ(op_difference(-1.0, 2.0), 2.0);  // max(1,2)=2
-    EXPECT_DOUBLE_EQ(op_difference(2.0, -3.0), -3.0); // max(-2,-3)=-2
+    EXPECT_DOUBLE_EQ(op_difference(2.0, -3.0), -2.0); // max(-2,-3)=-2
 }
 
 TEST(SdfOperations, UnionIdentity) {