diff --git a/src/entity.rs b/src/entity.rs
index 19e2d67..25b9166 100644
--- a/src/entity.rs
+++ b/src/entity.rs
@@ -2878,9 +2878,9 @@ mod tests {
     }
 
     #[test]
-    fn write_insert_no_extrusion_on_r12() {
+    fn write_insert_no_extrusion_on_r11() {
         let mut drawing = Drawing::new();
-        drawing.header.version = AcadVersion::R12;
+        drawing.header.version = AcadVersion::R11;
         let ins = Insert {
             extrusion_direction: Vector::new(1.0, 2.0, 3.0),
             ..Default::default()
@@ -2897,6 +2897,26 @@ mod tests {
         );
     }
 
+    #[test]
+    fn write_insert_extrusion_on_r12() {
+        let mut drawing = Drawing::new();
+        drawing.header.version = AcadVersion::R12;
+        let ins = Insert {
+            extrusion_direction: Vector::new(1.0, 2.0, 3.0),
+            ..Default::default()
+        };
+        let ent = Entity::new(EntityType::Insert(ins));
+        drawing.add_entity(ent);
+        assert_contains_pairs(
+            &drawing,
+            vec![
+                CodePair::new_f64(210, 1.0),
+                CodePair::new_f64(220, 2.0),
+                CodePair::new_f64(230, 3.0),
+            ],
+        );
+    }
+
     #[test]
     fn write_insert_extrusion_on_r13() {
         let mut drawing = Drawing::new();