diff --git a/magnum/api/utils.py b/magnum/api/utils.py
index bac3dbed5c..a3cc0443a1 100644
--- a/magnum/api/utils.py
+++ b/magnum/api/utils.py
@@ -64,7 +64,7 @@ def validate_docker_memory(mem_str):
                                          "<number>[<unit>],"
                                          "where unit = b, k, m or g"))
     if mem < DOCKER_MINIMUM_MEMORY:
-        raise wsme.exc.ClientSideError(_("Docker Minimum memory limit"
+        raise wsme.exc.ClientSideError(_("Docker Minimum memory limit "
                                          "allowed is %d B.")
                                        % DOCKER_MINIMUM_MEMORY)
 
diff --git a/magnum/common/exception.py b/magnum/common/exception.py
index c2e38b140d..2979ab82af 100755
--- a/magnum/common/exception.py
+++ b/magnum/common/exception.py
@@ -390,7 +390,7 @@ class FederationAlreadyExists(Conflict):
 
 
 class MemberAlreadyExists(Conflict):
-    message = _("A cluster with UUID %(uuid)s is already a member of the"
+    message = _("A cluster with UUID %(uuid)s is already a member of the "
                 "federation %(federation_name)s.")
 
 
diff --git a/magnum/common/urlfetch.py b/magnum/common/urlfetch.py
index b4b42e5e0f..d3cf0972cd 100755
--- a/magnum/common/urlfetch.py
+++ b/magnum/common/urlfetch.py
@@ -68,7 +68,7 @@ def get(url, allowed_schemes=('http', 'https')):
         for chunk in reader:
             result += chunk
             if len(result) > CONF.max_manifest_size:
-                raise URLFetchError("Manifest exceeds maximum allowed"
+                raise URLFetchError("Manifest exceeds maximum allowed "
                                     "size (%s bytes)" %
                                     CONF.max_manifest_size)
         return result
diff --git a/magnum/conf/trust.py b/magnum/conf/trust.py
index 07e174da8a..c16ec968e4 100644
--- a/magnum/conf/trust.py
+++ b/magnum/conf/trust.py
@@ -28,7 +28,7 @@ trust_opts = [
                        ' since the trust gives instances OpenStack API access'
                        " to the cluster's project. Note that this setting"
                        ' does not affect per-cluster trusts assigned to the'
-                       'Magnum service user.')),
+                       ' Magnum service user.')),
     cfg.StrOpt('trustee_domain_id',
                help=_('Id of the domain to create trustee for clusters')),
     cfg.StrOpt('trustee_domain_name',