diff --git a/modules/lab/src/test/java/org/locationtech/jts/operation/overlayarea/BaseOverlayAreaTest.java b/modules/lab/src/test/java/org/locationtech/jts/operation/overlayarea/BaseOverlayAreaTest.java
index fb21729a99..17550f30d5 100644
--- a/modules/lab/src/test/java/org/locationtech/jts/operation/overlayarea/BaseOverlayAreaTest.java
+++ b/modules/lab/src/test/java/org/locationtech/jts/operation/overlayarea/BaseOverlayAreaTest.java
@@ -128,6 +128,20 @@ public void testVertexIntersectionOnEdge2() {
             "POLYGON ((40 10, 20 30, 40 50, 50 30, 40 10))");
   }
 
+  public void testCollinearOverlappingEdgesPartial() {
+    checkIntersectionAreaSymmetric(
+        "POLYGON ((10 30, 30 30, 30 10, 10 10, 10 30))",
+        "POLYGON ((20 30, 40 30, 40 10, 20 10, 20 30))"
+    );
+  }
+
+  public void testCollinearOverlappingEdgesFull() {
+    checkIntersectionAreaSymmetric(
+        "POLYGON ((10 30, 50 30, 50 10, 10 10, 10 30))",
+        "POLYGON ((20 30, 40 30, 40 10, 20 10, 20 30))"
+    );
+  }
+
   protected final void checkIntersectionArea(String wktA, String wktB) {
     Geometry a = read(wktA);
     Geometry b = read(wktB);