diff --git a/x-pack/plugins/triggers_actions_ui/public/application/components/builtin_action_types/jira/jira.test.tsx b/x-pack/plugins/triggers_actions_ui/public/application/components/builtin_action_types/jira/jira.test.tsx
index 2d47740a581b8..ea1bcf82c314c 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/components/builtin_action_types/jira/jira.test.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/components/builtin_action_types/jira/jira.test.tsx
@@ -96,7 +96,7 @@ describe('jira action params validation', () => {
     };
 
     expect(actionTypeModel.validateParams(actionParams)).toEqual({
-      errors: { 'subActionParams.incident.summary': [] },
+      errors: { 'subActionParams.incident.summary': [], 'subActionParams.incident.labels': [] },
     });
   });
 
@@ -108,6 +108,23 @@ describe('jira action params validation', () => {
     expect(actionTypeModel.validateParams(actionParams)).toEqual({
       errors: {
         'subActionParams.incident.summary': ['Summary is required.'],
+        'subActionParams.incident.labels': [],
+      },
+    });
+  });
+
+  test('params validation fails when labels contain spaces', () => {
+    const actionParams = {
+      subActionParams: {
+        incident: { summary: 'some title', labels: ['label with spaces'] },
+        comments: [],
+      },
+    };
+
+    expect(actionTypeModel.validateParams(actionParams)).toEqual({
+      errors: {
+        'subActionParams.incident.summary': [],
+        'subActionParams.incident.labels': ['Labels cannot contain spaces.'],
       },
     });
   });
diff --git a/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/builtin_action_types/jira.ts b/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/builtin_action_types/jira.ts
index 6cc5e2eaefb94..8bd0b8a790d40 100644
--- a/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/builtin_action_types/jira.ts
+++ b/x-pack/test/alerting_api_integration/security_and_spaces/tests/actions/builtin_action_types/jira.ts
@@ -375,6 +375,34 @@ export default function jiraTest({ getService }: FtrProviderContext) {
               });
             });
         });
+
+        it('should handle failing with a simulated success when labels containing a space', async () => {
+          await supertest
+            .post(`/api/actions/action/${simulatedActionId}/_execute`)
+            .set('kbn-xsrf', 'foo')
+            .send({
+              params: {
+                ...mockJira.params,
+                subActionParams: {
+                  incident: {
+                    ...mockJira.params.subActionParams.incident,
+                    issueType: '10006',
+                    labels: ['label with spaces'],
+                  },
+                  comments: [],
+                },
+              },
+            })
+            .then((resp: any) => {
+              expect(resp.body).to.eql({
+                actionId: simulatedActionId,
+                status: 'error',
+                retry: false,
+                message:
+                  'error validating action params: types that failed validation:\n- [0.subAction]: expected value to equal [getFields]\n- [1.subAction]: expected value to equal [getIncident]\n- [2.subAction]: expected value to equal [handshake]\n- [3.subActionParams.incident.labels]: types that failed validation:\n - [subActionParams.incident.labels.0.0]: The label label with spaces cannot contain spaces\n - [subActionParams.incident.labels.1]: expected value to equal [null]\n- [4.subAction]: expected value to equal [issueTypes]\n- [5.subAction]: expected value to equal [fieldsByIssueType]\n- [6.subAction]: expected value to equal [issues]\n- [7.subAction]: expected value to equal [issue]',
+              });
+            });
+        });
       });
 
       describe('Execution', () => {