diff --git a/qa/libs/kimath/geometry/fixtures_geometry.h b/qa/libs/kimath/geometry/fixtures_geometry.h
index 9d66f6bbc2..93a3352b49 100644
--- a/qa/libs/kimath/geometry/fixtures_geometry.h
+++ b/qa/libs/kimath/geometry/fixtures_geometry.h
@@ -46,6 +46,8 @@ struct CommonTestData
     SHAPE_POLY_SET uniqueVertexPolySet;
     SHAPE_POLY_SET solidPolySet;
     SHAPE_POLY_SET holeyPolySet;
+    SHAPE_POLY_SET curvedPolyWrapRound;   ///< Causes arc wraparound when reloading from Clipper
+                                          ///< see https://gitlab.com/kicad/code/kicad/-/issues/9670
     SHAPE_POLY_SET holeyCurvedPolySingle; ///< Polygon with a single outline + multiple holes.
                                           ///< Holes and outline contain arcs
     SHAPE_POLY_SET holeyCurvedPolyMulti;  ///< Polygon with a multiple outlines + multiple holes.
@@ -146,6 +148,12 @@ struct CommonTestData
         hole.SetClosed( true );
         holeyPolySet.AddHole( hole );
 
+        //GENERATE CURVED POLYGON THAT CAUSES WRAPAROUND
+        SHAPE_LINE_CHAIN wrapLine;
+        wrapLine.Append( SHAPE_ARC( { -4300000, -6950000 }, { 2000000, 0 }, { -4300000, 6950000 }, 0 ) );
+        wrapLine.Append( SHAPE_ARC( { -4300000, 2200000 }, { -2700000, 0 }, { -4300000, -2200000 }, 0 ) );
+        wrapLine.SetClosed( true );
+        curvedPolyWrapRound.AddOutline( wrapLine );
 
         // GENERATE CURVED POLYGON WITH HOLES
         // For visualisation, launch test_pns with the arguments "viewcurvedpoly -[single|multi]"
diff --git a/qa/libs/kimath/geometry/test_shape_poly_set_arcs.cpp b/qa/libs/kimath/geometry/test_shape_poly_set_arcs.cpp
index 13cc59ac4d..b5a6fc356e 100644
--- a/qa/libs/kimath/geometry/test_shape_poly_set_arcs.cpp
+++ b/qa/libs/kimath/geometry/test_shape_poly_set_arcs.cpp
@@ -43,7 +43,8 @@ BOOST_AUTO_TEST_CASE( TestSimplify )
     std::map<std::string, SHAPE_POLY_SET> polysToTest =
     {
         { "Case 1: Single polygon", testData.holeyCurvedPolySingle },
-        //{ "Case 2: Multi polygon", testData.holeyCurvedPolyMulti } // This test fails right now:
+        { "Case 2: Wraparound polygon", testData.curvedPolyWrapRound },
+        //{ "Case 3: Multi polygon", testData.holeyCurvedPolyMulti } // This test fails right now:
                                                                      // clipper seems to not handle
                                                                      // multiple outlines correctly
     };
@@ -68,6 +69,7 @@ BOOST_AUTO_TEST_CASE( TestSimplify )
                     std::vector<SHAPE_ARC> foundArcs;
                     testPoly.GetArcs( foundArcs );
 
+                    BOOST_CHECK( GEOM_TEST::IsPolySetValid( testPoly ) );
                     BOOST_CHECK_EQUAL( testPoly.Area(), originalArea );
                     BOOST_CHECK_EQUAL( originalArcs.size(), foundArcs.size() );
                     KI_TEST::CheckUnorderedMatches( originalArcs, foundArcs,