diff --git a/src/platform/packages/shared/kbn-cps-utils/components/project_picker_content.tsx b/src/platform/packages/shared/kbn-cps-utils/components/project_picker_content.tsx
index cffe1cd04bb0a..af4f81377e468 100644
--- a/src/platform/packages/shared/kbn-cps-utils/components/project_picker_content.tsx
+++ b/src/platform/packages/shared/kbn-cps-utils/components/project_picker_content.tsx
@@ -100,6 +100,7 @@ export const ProjectPickerContent = ({
         </EuiPopoverTitle>
         {isReadonly && (
           <EuiCallOut
+            announceOnMount={false}
             size="s"
             css={styles.callout}
             title={strings.getProjectPickerReadonlyCallout()}
diff --git a/x-pack/platform/plugins/private/canvas/public/components/datasource/datasource_component.js b/x-pack/platform/plugins/private/canvas/public/components/datasource/datasource_component.js
index 7f402528f7a9c..af9ec387b9e2e 100644
--- a/x-pack/platform/plugins/private/canvas/public/components/datasource/datasource_component.js
+++ b/x-pack/platform/plugins/private/canvas/public/components/datasource/datasource_component.js
@@ -203,7 +203,7 @@ export class DatasourceComponent extends PureComponent {
               </EuiFlexGroup>
             </>
           ) : (
-            <EuiCallOut color="warning">
+            <EuiCallOut announceOnMount={false} color="warning">
               <p>{strings.getExpressionArgDescription()}</p>
             </EuiCallOut>
           )}