diff --git a/features/exit_statuses.feature b/features/exit_statuses.feature
index 5c5dffe..b971152 100644
--- a/features/exit_statuses.feature
+++ b/features/exit_statuses.feature
@@ -30,13 +30,3 @@ Feature: exit statuses
   Scenario: Unsuccessfully run something
     When I do aruba I successfully run `ruby -e 'exit 10'`
     Then aruba should fail with "Exit status was 10"
-
-  @posix
-  Scenario: Try to run something that doesn't exist
-    When I run `does_not_exist`
-    Then the exit status should be 1
-
-  @posix
-  Scenario: Try to run something that doesn't exist with `
-    When I run `does_not_exist`
-    Then the exit status should be 1
diff --git a/features/output.feature b/features/output.feature
index 8af06ca..7eea5a5 100644
--- a/features/output.feature
+++ b/features/output.feature
@@ -5,14 +5,6 @@ Feature: Output
   I want to use the "the output should contain" step
 
   @posix
-  Scenario: Run unknown command
-    When I run `neverever gonna work`
-    Then the output should contain:
-      """
-      No such file or directory - neverever
-      """
-
-  @posix
   Scenario: Detect subset of one-line output
     When I run `ruby -e 'puts \"hello world\"'`
     Then the output should contain "hello world"