diff --git a/src/row-map.coffee b/src/row-map.coffee
index 5c8290014..568c55ae7 100644
--- a/src/row-map.coffee
+++ b/src/row-map.coffee
@@ -174,3 +174,6 @@ class RowMap
       bufferRow += region.bufferRows
       screenRow += region.screenRows
     { index, screenRow, bufferRow }
+
+  inspect: ->
+    @regions.map(({screenRows, bufferRows}) -> "#{screenRows}:#{bufferRows}").join(', ')