diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index b5365832b0..ca2c78b243 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -368,8 +368,8 @@ clean_step:
 clean_steps:
   description: |
     An ordered list of cleaning steps that will be performed on the node. A
-    cleaning step is a dictionary with required keys ‘interface’ and ‘step’, and
-    optional key ‘args’. If specified, the value for ‘args’ is a keyword variable
+    cleaning step is a dictionary with required keys 'interface' and 'step', and
+    optional key 'args'. If specified, the value for 'args' is a keyword variable
     argument dictionary that is passed to the cleaning step method.
   in: body
   required: false
diff --git a/ironic/drivers/base.py b/ironic/drivers/base.py
index 7412f88c2b..79eefb0e7f 100644
--- a/ironic/drivers/base.py
+++ b/ironic/drivers/base.py
@@ -1182,9 +1182,9 @@ def _validate_argsinfo(argsinfo):
     :param argsinfo: a dictionary of keyword arguments where key is the name of
         the argument and value is a dictionary as follows::
 
-            ‘description’: <description>. Required. This should include
+            'description': <description>. Required. This should include
                            possible values.
-            ‘required’: Boolean. Optional; default is False. True if this
+            'required': Boolean. Optional; default is False. True if this
                         argument is required.  If so, it must be specified in
                         the clean request; false if it is optional.
     :raises InvalidParameterValue: if any of the arguments are invalid
@@ -1276,9 +1276,9 @@ def clean_step(priority, abortable=False, argsinfo=None):
     :param argsinfo: a dictionary of keyword arguments where key is the name of
         the argument and value is a dictionary as follows::
 
-            ‘description’: <description>. Required. This should include
+            'description': <description>. Required. This should include
                            possible values.
-            ‘required’: Boolean. Optional; default is False. True if this
+            'required': Boolean. Optional; default is False. True if this
                         argument is required.  If so, it must be specified in
                         the clean request; false if it is optional.
     :raises InvalidParameterValue: if any of the arguments are invalid