diff --git a/spec/app/buffer-spec.coffee b/spec/app/buffer-spec.coffee
index f90802175..b95f9af34 100644
--- a/spec/app/buffer-spec.coffee
+++ b/spec/app/buffer-spec.coffee
@@ -713,6 +713,13 @@ describe 'Buffer', ->
         expect(buffer.getMarkerRange(marker)).toEqual [[2, 0], [4, 23]]
         expect(buffer.isMarkerReversed(marker)).toBeTruthy()
 
+      it "returns whether the position changed", ->
+        expect(buffer.setMarkerHeadPosition(marker, [5, 3])).toBeTruthy()
+        expect(buffer.setMarkerHeadPosition(marker, [5, 3])).toBeFalsy()
+
+        expect(buffer.setMarkerTailPosition(marker, [6, 3])).toBeTruthy()
+        expect(buffer.setMarkerTailPosition(marker, [6, 3])).toBeFalsy()
+
     describe ".observeMarker(marker, callback)", ->
       [observeHandler, marker, subscription] = []
 
diff --git a/spec/app/display-buffer-spec.coffee b/spec/app/display-buffer-spec.coffee
index 0c88b9652..7b75bdc9f 100644
--- a/spec/app/display-buffer-spec.coffee
+++ b/spec/app/display-buffer-spec.coffee
@@ -613,6 +613,17 @@ describe "DisplayBuffer", ->
         expect(displayBuffer.isMarkerReversed(marker)).toBeTruthy()
         expect(displayBuffer.getMarkerBufferRange(marker)).toEqual [[5, 4], [8, 4]]
 
+      it "returns whether a position changed when it is assigned", ->
+        marker = displayBuffer.markScreenRange([[0, 0], [0, 0]])
+        expect(displayBuffer.setMarkerHeadScreenPosition(marker, [5, 4])).toBeTruthy()
+        expect(displayBuffer.setMarkerHeadScreenPosition(marker, [5, 4])).toBeFalsy()
+        expect(displayBuffer.setMarkerHeadBufferPosition(marker, [1, 0])).toBeTruthy()
+        expect(displayBuffer.setMarkerHeadBufferPosition(marker, [1, 0])).toBeFalsy()
+        expect(displayBuffer.setMarkerTailScreenPosition(marker, [5, 4])).toBeTruthy()
+        expect(displayBuffer.setMarkerTailScreenPosition(marker, [5, 4])).toBeFalsy()
+        expect(displayBuffer.setMarkerTailBufferPosition(marker, [1, 0])).toBeTruthy()
+        expect(displayBuffer.setMarkerTailBufferPosition(marker, [1, 0])).toBeFalsy()
+
     describe ".observeMarker(marker, callback)", ->
       [observeHandler, marker, subscription] = []