diff --git a/features/command_line.feature b/features/command_line.feature
index 4c55ef91..5e35fb84 100644
--- a/features/command_line.feature
+++ b/features/command_line.feature
@@ -153,4 +153,21 @@ Feature: Command Line
     And I touch sass/layout.sass
     And I wait 2 seconds
     And I shutdown the other process
-    And a css file tmp/layout.css is reported identical
+    Then a css file tmp/layout.css is reported identical
+
+  Scenario: Generating a grid image so that I can debug my grid alignments
+    Given I am using the existing project in test/fixtures/stylesheets/compass
+    When I run: compass grid-img 30+10x24
+    Then a png file images/grid.png is created
+
+  Scenario: Generating a grid image to a specified path with custom dimensions
+    Given I am using the existing project in test/fixtures/stylesheets/compass
+    When I run: compass grid-img 50+10x24 assets/wide_grid.png
+    Then a directory assets is created
+    Then a png file assets/wide_grid.png is created
+
+  Scenario: Generating a grid image with invalid dimensions
+    Given I am using the existing project in test/fixtures/stylesheets/compass
+    When I run: compass grid-img 50x24 assets/wide_grid.png
+    Then a directory assets is not created
+    And a png file assets/wide_grid.png is not created