diff --git a/image_prediction/stitching/merging.py b/image_prediction/stitching/merging.py
index fc557ef..87bc673 100644
--- a/image_prediction/stitching/merging.py
+++ b/image_prediction/stitching/merging.py
@@ -10,7 +10,7 @@ from image_prediction.info import Info
 from image_prediction.stitching.grouping import CoordGrouper
 from image_prediction.stitching.utils import make_coord_getter, flatten_groups_once
 from image_prediction.utils.generic import until
-from test.utils.stitching import HorizontalSplitMapper, VerticalMapper
+from image_prediction.stitching.split_mapper import HorizontalSplitMapper, VerticalMapper
 
 
 def no_new_merges(pairs1, pairs2):
diff --git a/image_prediction/stitching/split_mapper.py b/image_prediction/stitching/split_mapper.py
new file mode 100644
index 0000000..95b1470
--- /dev/null
+++ b/image_prediction/stitching/split_mapper.py
@@ -0,0 +1,49 @@
+import abc
+
+from image_prediction.info import Info
+
+
+class SplitMapper(abc.ABC):
+    def __init__(self, wrapped: dict, keymap: dict):
+        self.wrapped = wrapped
+        self.keymap = keymap
+
+    def __getitem__(self, key):
+        return self.wrapped[self.keymap[key]]
+
+    def __setitem__(self, key, value):
+        self.wrapped[self.keymap[key]] = value
+
+    @property
+    def dim(self):
+        return self["dim"]
+
+    @dim.setter
+    def dim(self, value):
+        self["dim"] = value
+
+    @property
+    def c1(self):
+        return self["c1"]
+
+    @c1.setter
+    def c1(self, value):
+        self["c1"] = value
+
+    @property
+    def c2(self):
+        return self["c2"]
+
+    @c2.setter
+    def c2(self, value):
+        self["c2"] = value
+
+
+class HorizontalSplitMapper(SplitMapper):
+    def __init__(self, wrapped: dict):
+        super().__init__(wrapped, {"dim": Info.WIDTH, "c1": Info.X1, "c2": Info.X2})
+
+
+class VerticalMapper(SplitMapper):
+    def __init__(self, wrapped: dict):
+        super().__init__(wrapped, {"dim": Info.HEIGHT, "c1": Info.Y1, "c2": Info.Y2})
\ No newline at end of file
diff --git a/test/utils/stitching.py b/test/utils/stitching.py
index 9bb2df0..eb41797 100644
--- a/test/utils/stitching.py
+++ b/test/utils/stitching.py
@@ -1,57 +1,10 @@
-import abc
 import random
 from copy import deepcopy
 from itertools import chain
 
 from funcy import rpartial, juxt
 
-from image_prediction.info import Info
-
-
-class SplitMapper(abc.ABC):
-    def __init__(self, wrapped: dict, keymap: dict):
-        self.wrapped = wrapped
-        self.keymap = keymap
-
-    def __getitem__(self, key):
-        return self.wrapped[self.keymap[key]]
-
-    def __setitem__(self, key, value):
-        self.wrapped[self.keymap[key]] = value
-
-    @property
-    def dim(self):
-        return self["dim"]
-
-    @dim.setter
-    def dim(self, value):
-        self["dim"] = value
-
-    @property
-    def c1(self):
-        return self["c1"]
-
-    @c1.setter
-    def c1(self, value):
-        self["c1"] = value
-
-    @property
-    def c2(self):
-        return self["c2"]
-
-    @c2.setter
-    def c2(self, value):
-        self["c2"] = value
-
-
-class HorizontalSplitMapper(SplitMapper):
-    def __init__(self, wrapped: dict):
-        super().__init__(wrapped, {"dim": Info.WIDTH, "c1": Info.X1, "c2": Info.X2})
-
-
-class VerticalMapper(SplitMapper):
-    def __init__(self, wrapped: dict):
-        super().__init__(wrapped, {"dim": Info.HEIGHT, "c1": Info.Y1, "c2": Info.Y2})
+from image_prediction.stitching.split_mapper import SplitMapper, HorizontalSplitMapper, VerticalMapper
 
 
 class BoxSplitter: