diff --git a/tests/src/Mod/Sketcher/App/SketchObject.cpp b/tests/src/Mod/Sketcher/App/SketchObject.cpp
index 12122b4146e41..f555e06ba4c2e 100644
--- a/tests/src/Mod/Sketcher/App/SketchObject.cpp
+++ b/tests/src/Mod/Sketcher/App/SketchObject.cpp
@@ -572,6 +572,8 @@ TEST_F(SketchObjectTest, testConstraintAfterDeletingGeo)
     // Arrange
     int geoId1 = 42, geoId2 = 10, geoId3 = 0, geoId4 = -8;
 
+    Sketcher::Constraint* nullConstr = nullptr;
+
     Sketcher::Constraint constr1;
     constr1.Type = Sketcher::ConstraintType::Coincident;
     constr1.First = geoId1;
@@ -588,6 +590,18 @@ TEST_F(SketchObjectTest, testConstraintAfterDeletingGeo)
     constr2.Third = geoId1;
     constr2.ThirdPos = Sketcher::PointPos::start;
 
+    // Act
+    auto nullConstrAfter = getObject()->getConstraintAfterDeletingGeo(nullConstr, 5);
+
+    // Assert
+    EXPECT_EQ(nullConstrAfter, nullptr);
+
+    // Act
+    getObject()->changeConstraintAfterDeletingGeo(nullConstr, 5);
+
+    // Assert
+    EXPECT_EQ(nullConstr, nullptr);
+
     // Act
     // delete typical in-sketch geo
     auto constr1PtrAfter1 = getObject()->getConstraintAfterDeletingGeo(&constr1, 5);