diff --git a/testdata/scad/features/rotate_extrude-tests.scad b/testdata/scad/features/rotate_extrude-tests.scad
index ec8d1cce..8eb011b1 100644
--- a/testdata/scad/features/rotate_extrude-tests.scad
+++ b/testdata/scad/features/rotate_extrude-tests.scad
@@ -11,7 +11,7 @@ rotate_extrude() translate([20,0,0]) circle(r=10);
 // Sweep of polygon with hole
 translate([50,-20,0]) {
   difference() { 
-    rotate_extrude() translate([20,0,0]) difference() {
+    rotate_extrude(convexity=4) translate([20,0,0]) difference() {
       circle(r=10); circle(r=8);
     }
     translate([-50,0,0]) cube([100,100,100], center=true);
@@ -22,8 +22,8 @@ translate([50,-20,0]) {
 translate([50,50,0]) {
   difference() { 
     difference() {
-      rotate_extrude() translate([20,0,0]) circle(r=10);
-      rotate_extrude() translate([20,0,0]) circle(r=8);
+      rotate_extrude(convexity=2) translate([20,0,0]) circle(r=10);
+      rotate_extrude(convexity=2) translate([20,0,0]) circle(r=8);
     }
     translate([-50,0,0]) cube([100,100,100], center=true);
   }
diff --git a/tests/regression/dumptest/rotate_extrude-tests-expected.csg b/tests/regression/dumptest/rotate_extrude-tests-expected.csg
index d010bfd6..23c8d6e9 100644
--- a/tests/regression/dumptest/rotate_extrude-tests-expected.csg
+++ b/tests/regression/dumptest/rotate_extrude-tests-expected.csg
@@ -11,7 +11,7 @@ group() {
 	}
 	multmatrix([[1, 0, 0, 50], [0, 1, 0, -20], [0, 0, 1, 0], [0, 0, 0, 1]]) {
 		difference() {
-			rotate_extrude(convexity = 1, $fn = 0, $fa = 12, $fs = 2) {
+			rotate_extrude(convexity = 4, $fn = 0, $fa = 12, $fs = 2) {
 				multmatrix([[1, 0, 0, 20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
 					difference() {
 						circle($fn = 0, $fa = 12, $fs = 2, r = 10);
@@ -27,12 +27,12 @@ group() {
 	multmatrix([[1, 0, 0, 50], [0, 1, 0, 50], [0, 0, 1, 0], [0, 0, 0, 1]]) {
 		difference() {
 			difference() {
-				rotate_extrude(convexity = 1, $fn = 0, $fa = 12, $fs = 2) {
+				rotate_extrude(convexity = 2, $fn = 0, $fa = 12, $fs = 2) {
 					multmatrix([[1, 0, 0, 20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
 						circle($fn = 0, $fa = 12, $fs = 2, r = 10);
 					}
 				}
-				rotate_extrude(convexity = 1, $fn = 0, $fa = 12, $fs = 2) {
+				rotate_extrude(convexity = 2, $fn = 0, $fa = 12, $fs = 2) {
 					multmatrix([[1, 0, 0, 20], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
 						circle($fn = 0, $fa = 12, $fs = 2, r = 8);
 					}
diff --git a/tests/regression/opencsgtest/rotate_extrude-tests-expected.png b/tests/regression/opencsgtest/rotate_extrude-tests-expected.png
index 0be247ee..1b92980b 100644
Binary files a/tests/regression/opencsgtest/rotate_extrude-tests-expected.png and b/tests/regression/opencsgtest/rotate_extrude-tests-expected.png differ