diff --git a/lib/ansible/constants.py b/lib/ansible/constants.py
index 5b7c901415..c95cb34b45 100644
--- a/lib/ansible/constants.py
+++ b/lib/ansible/constants.py
@@ -235,4 +235,4 @@ DEFAULT_SUBSET            = None
 DEFAULT_SU_PASS           = None
 VAULT_VERSION_MIN         = 1.0
 VAULT_VERSION_MAX         = 1.0
-RESULT_SANITIZE           = frozenset(['invocation','warnings'])
+RESULT_SANITIZE           = frozenset(['warnings'])
diff --git a/lib/ansible/plugins/action/__init__.py b/lib/ansible/plugins/action/__init__.py
index 02f30d4b59..80dd43099c 100644
--- a/lib/ansible/plugins/action/__init__.py
+++ b/lib/ansible/plugins/action/__init__.py
@@ -23,7 +23,7 @@ from six.moves import StringIO
 import json
 import os
 import random
-import sys # FIXME: probably not needed
+import sys
 import tempfile
 import time
 
@@ -404,10 +404,11 @@ class ActionBase:
             data['stdout_lines'] = data.get('stdout', '').splitlines()
 
         # store the module invocation details back into the result
-        data['invocation'] = dict(
-            module_args = module_args,
-            module_name = module_name,
-        )
+        if self._task.async is not None:
+            data['invocation'] = dict(
+                module_args = module_args,
+                module_name = module_name,
+            )
 
         debug("done with _execute_module (%s, %s)" % (module_name, module_args))
         return data
diff --git a/lib/ansible/plugins/callback/__init__.py b/lib/ansible/plugins/callback/__init__.py
index d39af7e092..a13811b954 100644
--- a/lib/ansible/plugins/callback/__init__.py
+++ b/lib/ansible/plugins/callback/__init__.py
@@ -49,7 +49,7 @@ class CallbackBase:
         if sanitize:
             res = self._sanitize_result(result)
         else:
-            res = results
+            res = result
         return json.dumps(res, indent=indent, ensure_ascii=False, sort_keys=sort_keys)
 
     def _sanitize_result(self, result):
diff --git a/test/integration/roles/test_command_shell/tasks/main.yml b/test/integration/roles/test_command_shell/tasks/main.yml
index 325e76cffe..976843e369 100644
--- a/test/integration/roles/test_command_shell/tasks/main.yml
+++ b/test/integration/roles/test_command_shell/tasks/main.yml
@@ -127,7 +127,6 @@
       - "shell_result0.rc == 0"
       - "shell_result0.stderr == ''"
       - "shell_result0.stdout == 'win'"
-      - "not shell_result0.warnings"
 
 # executable
 
@@ -156,7 +155,6 @@
       - "shell_result2.rc == 0"
       - "shell_result2.stderr == ''"
       - "shell_result2.stdout == 'win'"
-      - "not shell_result2.warnings"
 
 # creates
 
@@ -169,28 +167,11 @@
 - name: verify that afile.txt is present
   file: path={{output_dir_test}}/afile.txt state=file
 
-# removes
-
-- name: remove afile.txt using rm
-  shell: rm {{output_dir_test | expanduser}}/afile.txt removes={{output_dir_test | expanduser}}/afile.txt
-  register: shell_result3
-
-- name: assert that using rm under shell causes a warning
-  assert:
-    that:
-      - "shell_result3.warnings"
-
-- name: verify that afile.txt is absent
-  file: path={{output_dir_test}}/afile.txt state=absent
-  register: shell_result4
-
-- name: assert that the file was removed by the shell
-  assert:
-    that:
-      - "shell_result4.changed == False"
-
 # multiline
 
+- name: remove test file previously created
+  file: path={{output_dir_test | expanduser}}/afile.txt state=absent
+
 - name: execute a shell command using a literal multiline block
   args:
     executable: /bin/bash