diff --git a/x-pack/legacy/plugins/siem/public/components/open_timeline/helpers.test.ts b/x-pack/legacy/plugins/siem/public/components/open_timeline/helpers.test.ts
index 120d644b3b33..60ebd2578b7c 100644
--- a/x-pack/legacy/plugins/siem/public/components/open_timeline/helpers.test.ts
+++ b/x-pack/legacy/plugins/siem/public/components/open_timeline/helpers.test.ts
@@ -236,7 +236,7 @@ describe('helpers', () => {
         description: '',
         deletedEventIds: [],
         eventIdToNoteIds: {},
-        eventType: 'raw',
+        eventType: 'all',
         filters: [],
         highlightedDropAndProviderId: '',
         historyIds: [],
@@ -330,7 +330,7 @@ describe('helpers', () => {
         description: '',
         deletedEventIds: [],
         eventIdToNoteIds: {},
-        eventType: 'raw',
+        eventType: 'all',
         filters: [],
         highlightedDropAndProviderId: '',
         historyIds: [],
@@ -417,7 +417,7 @@ describe('helpers', () => {
         description: '',
         deletedEventIds: [],
         eventIdToNoteIds: {},
-        eventType: 'raw',
+        eventType: 'all',
         filters: [],
         highlightedDropAndProviderId: '',
         historyIds: [],
@@ -539,7 +539,7 @@ describe('helpers', () => {
         description: '',
         deletedEventIds: [],
         eventIdToNoteIds: {},
-        eventType: 'raw',
+        eventType: 'all',
         filters: [
           {
             $state: {
diff --git a/x-pack/legacy/plugins/siem/public/components/timeline/search_or_filter/pick_events.tsx b/x-pack/legacy/plugins/siem/public/components/timeline/search_or_filter/pick_events.tsx
index 76f9e6fe3673..3117bae74528 100644
--- a/x-pack/legacy/plugins/siem/public/components/timeline/search_or_filter/pick_events.tsx
+++ b/x-pack/legacy/plugins/siem/public/components/timeline/search_or_filter/pick_events.tsx
@@ -77,6 +77,7 @@ const PickEventTypeComponents: React.FC<PickEventTypeProps> = ({
   return (
     <PickEventContainer>
       <EuiSuperSelect
+        data-test-subj="pick-event-type"
         fullWidth={false}
         valueOfSelected={eventType}
         onChange={onChangeEventType}
diff --git a/x-pack/legacy/plugins/siem/public/components/timeline/timeline.test.tsx b/x-pack/legacy/plugins/siem/public/components/timeline/timeline.test.tsx
index f7c0d0b47573..f89779802e14 100644
--- a/x-pack/legacy/plugins/siem/public/components/timeline/timeline.test.tsx
+++ b/x-pack/legacy/plugins/siem/public/components/timeline/timeline.test.tsx
@@ -208,6 +208,50 @@ describe('Timeline', () => {
 
       expect(wrapper.find('[data-test-subj="table-pagination"]').exists()).toEqual(false);
     });
+
+    test('it defaults to showing `All events`', () => {
+      const wrapper = mount(
+        <TestProviders>
+          <MockedProvider mocks={mocks}>
+            <TimelineComponent
+              browserFields={mockBrowserFields}
+              columns={defaultHeaders}
+              id="foo"
+              dataProviders={mockDataProviders}
+              end={endDate}
+              eventType="all" // CAUTION: `eventType` is an optional prop in post-`7.6.x` branches. In later branches, `eventType` is omitted from this test, to truly verify the new default from redux. In this branch, we must specify `eventType` to pass the type check, but this is not the true intent of this test.
+              filters={[]}
+              flyoutHeight={testFlyoutHeight}
+              flyoutHeaderHeight={flyoutHeaderHeight}
+              indexPattern={indexPattern}
+              indexToAdd={[]}
+              isLive={false}
+              itemsPerPage={5}
+              itemsPerPageOptions={[5, 10, 20]}
+              kqlMode="search"
+              kqlQueryExpression=""
+              loadingIndexName={false}
+              onChangeDataProviderKqlQuery={jest.fn()}
+              onChangeDroppableAndProvider={jest.fn()}
+              onChangeItemsPerPage={jest.fn()}
+              onDataProviderEdited={jest.fn()}
+              onDataProviderRemoved={jest.fn()}
+              onToggleDataProviderEnabled={jest.fn()}
+              onToggleDataProviderExcluded={jest.fn()}
+              show={true}
+              showCallOutUnauthorizedMsg={false}
+              start={startDate}
+              sort={sort}
+              toggleColumn={jest.fn()}
+            />
+          </MockedProvider>
+        </TestProviders>
+      );
+
+      expect(wrapper.find('[data-test-subj="pick-event-type"] button').text()).toEqual(
+        'All events'
+      );
+    });
   });
 
   describe('event wire up', () => {
diff --git a/x-pack/legacy/plugins/siem/public/store/timeline/defaults.ts b/x-pack/legacy/plugins/siem/public/store/timeline/defaults.ts
index bbaf2a3fb6e3..7f04bb4c4dad 100644
--- a/x-pack/legacy/plugins/siem/public/store/timeline/defaults.ts
+++ b/x-pack/legacy/plugins/siem/public/store/timeline/defaults.ts
@@ -14,7 +14,7 @@ export const timelineDefaults: SubsetTimelineModel & Pick<TimelineModel, 'filter
   dataProviders: [],
   deletedEventIds: [],
   description: '',
-  eventType: 'raw',
+  eventType: 'all',
   eventIdToNoteIds: {},
   highlightedDropAndProviderId: '',
   historyIds: [],