diff --git a/common/src/app/common/files/builder.cljc b/common/src/app/common/files/builder.cljc
index 4354986b8d..cc3dd11879 100644
--- a/common/src/app/common/files/builder.cljc
+++ b/common/src/app/common/files/builder.cljc
@@ -356,7 +356,7 @@
                 :code :empty-children
                 :hint "expected a group with at least one shape for creating a bool"))
 
-    (let [head  (if (= type :difference)
+    (let [head  (if (= (:bool-type bool-shape) :difference)
                   (first children)
                   (last children))
           fills (if (and (contains? head :svg-attrs) (empty? (:fills head)))
@@ -364,7 +364,7 @@
                   (get head :fills))]
       (-> bool-shape
           (assoc :fills fills)
-          (assoc :stroks (get head :strokes))))))
+          (assoc :strokes (get head :strokes))))))
 
 (defn add-bool
   [state params]
@@ -576,7 +576,7 @@
         {:keys [id width height name]}
         (-> params
             (update :id default-uuid)
-            (check-add-file-media params))]
+            (check-add-file-media))]
 
     (-> state
         (update ::blobs assoc media-id blob)
diff --git a/common/test/common_tests/files_builder_test.cljc b/common/test/common_tests/files_builder_test.cljc
new file mode 100644
index 0000000000..23dd6c78cc
--- /dev/null
+++ b/common/test/common_tests/files_builder_test.cljc
@@ -0,0 +1,72 @@
+;; This Source Code Form is subject to the terms of the Mozilla Public
+;; License, v. 2.0. If a copy of the MPL was not distributed with this
+;; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;;
+;; Copyright (c) KALEIDOS INC
+
+(ns common-tests.files-builder-test
+  (:require
+   [app.common.files.builder :as fb]
+   [app.common.uuid :as uuid]
+   [clojure.test :as t]))
+
+(defn- stroke
+  [color]
+  [{:stroke-style :solid
+    :stroke-alignment :inner
+    :stroke-width 1
+    :stroke-color color
+    :stroke-opacity 1}])
+
+(t/deftest add-bool-uses-difference-head-style
+  (let [file-id  (uuid/next)
+        page-id  (uuid/next)
+        group-id (uuid/next)
+        child-a  (uuid/next)
+        child-b  (uuid/next)
+        state    (-> (fb/create-state)
+                     (fb/add-file {:id file-id :name "Test file"})
+                     (fb/add-page {:id page-id :name "Page 1"})
+                     (fb/add-group {:id group-id :name "Group A"})
+                     (fb/add-shape {:id child-a
+                                    :type :rect
+                                    :name "A"
+                                    :x 0
+                                    :y 0
+                                    :width 10
+                                    :height 10
+                                    :strokes (stroke "#ff0000")})
+                     (fb/add-shape {:id child-b
+                                    :type :rect
+                                    :name "B"
+                                    :x 20
+                                    :y 0
+                                    :width 10
+                                    :height 10
+                                    :strokes (stroke "#00ff00")})
+                     (fb/close-group)
+                     (fb/add-bool {:group-id group-id
+                                   :type :difference}))
+        bool     (fb/get-shape state group-id)]
+    (t/is (= :bool (:type bool)))
+    (t/is (= (stroke "#ff0000") (:strokes bool)))))
+
+(t/deftest add-file-media-validates-and-persists-media
+  (let [file-id  (uuid/next)
+        page-id  (uuid/next)
+        image-id (uuid/next)
+        state    (-> (fb/create-state)
+                     (fb/add-file {:id file-id :name "Test file"})
+                     (fb/add-page {:id page-id :name "Page 1"})
+                     (fb/add-file-media {:id image-id
+                                         :name "Image"
+                                         :width 128
+                                         :height 64}
+                                        (fb/map->BlobWrapper {:mtype "image/png"
+                                                              :size 42
+                                                              :blob nil})))
+        media    (get-in state [::fb/file-media image-id])]
+    (t/is (= image-id (::fb/last-id state)))
+    (t/is (= "Image" (:name media)))
+    (t/is (= 128 (:width media)))
+    (t/is (= 64 (:height media)))))
diff --git a/common/test/common_tests/runner.cljc b/common/test/common_tests/runner.cljc
index b8a9fc8934..6df8243077 100644
--- a/common/test/common_tests/runner.cljc
+++ b/common/test/common_tests/runner.cljc
@@ -10,6 +10,7 @@
    [common-tests.buffer-test]
    [common-tests.colors-test]
    [common-tests.data-test]
+   [common-tests.files-builder-test]
    [common-tests.files-changes-test]
    [common-tests.files-migrations-test]
    [common-tests.geom-align-test]
@@ -82,6 +83,7 @@
    'common-tests.colors-test
    'common-tests.data-test
    'common-tests.files-changes-test
+   'common-tests.files-builder-test
    'common-tests.files-migrations-test
    'common-tests.geom-align-test
    'common-tests.geom-bounds-map-test