diff --git a/packages/bruno-app/src/providers/ReduxStore/slices/tabs.js b/packages/bruno-app/src/providers/ReduxStore/slices/tabs.js
index 7b9c24e3f..afac7998a 100644
--- a/packages/bruno-app/src/providers/ReduxStore/slices/tabs.js
+++ b/packages/bruno-app/src/providers/ReduxStore/slices/tabs.js
@@ -104,6 +104,8 @@ export const tabsSlice = createSlice({
           requestPaneHeight: null,
           requestPaneCollapsed: false,
           responsePaneCollapsed: false,
+          requestPaneWidthBeforeCollapse: null,
+          requestPaneHeightBeforeCollapse: null,
           requestPaneTab: requestPaneTab || defaultRequestPaneTab,
           responsePaneTab: 'response',
           responseFormat: null,
@@ -133,6 +135,8 @@ export const tabsSlice = createSlice({
         requestPaneHeight: null,
         requestPaneCollapsed: false,
         responsePaneCollapsed: false,
+        requestPaneWidthBeforeCollapse: null,
+        requestPaneHeightBeforeCollapse: null,
         requestPaneTab: requestPaneTab || defaultRequestPaneTab,
         responsePaneTab: 'response',
         responseFormat: null,
@@ -379,6 +383,8 @@ export const tabsSlice = createSlice({
       if (tab) {
         tab.requestPaneCollapsed = true;
         tab.responsePaneCollapsed = false;
+        tab.requestPaneWidthBeforeCollapse = tab.requestPaneWidth;
+        tab.requestPaneHeightBeforeCollapse = tab.requestPaneHeight;
       }
     },
     collapseResponsePane: (state, action) => {
@@ -392,18 +398,20 @@ export const tabsSlice = createSlice({
       const tab = find(state.tabs, (t) => t.uid === action.payload.uid);
       if (tab) {
         tab.requestPaneCollapsed = false;
-        // reset so the panes return to their default size on expand
-        tab.requestPaneWidth = null;
-        tab.requestPaneHeight = null;
+        if (tab.requestPaneWidthBeforeCollapse != null) {
+          tab.requestPaneWidth = tab.requestPaneWidthBeforeCollapse;
+        }
+        if (tab.requestPaneHeightBeforeCollapse != null) {
+          tab.requestPaneHeight = tab.requestPaneHeightBeforeCollapse;
+        }
+        tab.requestPaneWidthBeforeCollapse = null;
+        tab.requestPaneHeightBeforeCollapse = null;
       }
     },
     expandResponsePane: (state, action) => {
       const tab = find(state.tabs, (t) => t.uid === action.payload.uid);
       if (tab) {
         tab.responsePaneCollapsed = false;
-        // reset so the panes return to their default size on expand
-        tab.requestPaneWidth = null;
-        tab.requestPaneHeight = null;
       }
     },
     reorderTabs: (state, action) => {
diff --git a/packages/bruno-app/src/providers/ReduxStore/slices/tabs.spec.js b/packages/bruno-app/src/providers/ReduxStore/slices/tabs.spec.js
deleted file mode 100644
index 0979483d5..000000000
--- a/packages/bruno-app/src/providers/ReduxStore/slices/tabs.spec.js
+++ /dev/null
@@ -1,59 +0,0 @@
-import reducer, {
-  collapseRequestPane,
-  collapseResponsePane,
-  expandRequestPane,
-  expandResponsePane
-} from './tabs';
-
-const makeState = (overrides = {}) => ({
-  tabs: [{
-    uid: 'tab-1',
-    collectionUid: 'col-1',
-    type: 'http-request',
-    requestPaneWidth: 500,
-    requestPaneHeight: 400,
-    requestPaneCollapsed: false,
-    responsePaneCollapsed: false,
-    ...overrides
-  }],
-  activeTabUid: 'tab-1',
-  recentlyClosedTabs: []
-});
-
-describe('tabs slice - collapse/expand reducers', () => {
-  it('collapseRequestPane flips flags and preserves stored dimensions', () => {
-    const next = reducer(makeState({ responsePaneCollapsed: true }), collapseRequestPane({ uid: 'tab-1' }));
-
-    expect(next.tabs[0].requestPaneCollapsed).toBe(true);
-    expect(next.tabs[0].responsePaneCollapsed).toBe(false);
-    expect(next.tabs[0].requestPaneWidth).toBe(500);
-    expect(next.tabs[0].requestPaneHeight).toBe(400);
-  });
-
-  it('collapseResponsePane flips flags and preserves stored dimensions', () => {
-    const next = reducer(makeState({ requestPaneCollapsed: true }), collapseResponsePane({ uid: 'tab-1' }));
-
-    expect(next.tabs[0].requestPaneCollapsed).toBe(false);
-    expect(next.tabs[0].responsePaneCollapsed).toBe(true);
-    expect(next.tabs[0].requestPaneWidth).toBe(500);
-    expect(next.tabs[0].requestPaneHeight).toBe(400);
-  });
-
-  it('expandRequestPane flips flag and resets stored dimensions to default', () => {
-    const next = reducer(makeState({ requestPaneCollapsed: true }), expandRequestPane({ uid: 'tab-1' }));
-
-    expect(next.tabs[0].requestPaneCollapsed).toBe(false);
-    expect(next.tabs[0].responsePaneCollapsed).toBe(false);
-    expect(next.tabs[0].requestPaneWidth).toBeNull();
-    expect(next.tabs[0].requestPaneHeight).toBeNull();
-  });
-
-  it('expandResponsePane flips flag and resets stored dimensions to default', () => {
-    const next = reducer(makeState({ responsePaneCollapsed: true }), expandResponsePane({ uid: 'tab-1' }));
-
-    expect(next.tabs[0].responsePaneCollapsed).toBe(false);
-    expect(next.tabs[0].requestPaneCollapsed).toBe(false);
-    expect(next.tabs[0].requestPaneWidth).toBeNull();
-    expect(next.tabs[0].requestPaneHeight).toBeNull();
-  });
-});