diff --git a/test/test_all.scad b/test/test_all.scad
index 6ae6677f..ad41d935 100644
--- a/test/test_all.scad
+++ b/test/test_all.scad
@@ -69,6 +69,7 @@ include <util/test_reverse.scad>;
 include <util/test_fibseq.scad>;
 include <util/test_bsearch.scad>;
 include <util/test_choose.scad>;
+include <util/test_dedup.scad>;
 
 // Voxel
 include <voxel/test_vx_line.scad>;
diff --git a/test/util/test_dedup.scad b/test/util/test_dedup.scad
new file mode 100644
index 00000000..8ebd9160
--- /dev/null
+++ b/test/util/test_dedup.scad
@@ -0,0 +1,19 @@
+use <util/dedup.scad>;
+use <util/sort.scad>;
+
+module test_dedup() {
+    echo("==== test_dedup ====");
+
+    points = [[1, 1, 2], [3, 4, 2], [7, 2, 2], [3, 4, 2], [1, 2, 3]];
+    assert(
+        dedup([[1, 1, 2], [3, 4, 2], [7, 2, 2], [3, 4, 2], [1, 2, 3]]) 
+            == [[1, 1, 2], [3, 4, 2], [7, 2, 2], [1, 2, 3]]
+    );
+    
+    assert(
+        dedup(sort([[1, 1, 2], [3, 4, 2], [7, 2, 2], [3, 4, 2], [1, 2, 3]]), sorted = true) 
+            == [[1, 1, 2], [1, 2, 3], [3, 4, 2], [7, 2, 2]]
+    );
+}
+
+test_dedup();
\ No newline at end of file