diff --git a/packages/bruno-app/src/components/EditableTable/index.js b/packages/bruno-app/src/components/EditableTable/index.js
index 5fcf171b3..3e3bd29f5 100644
--- a/packages/bruno-app/src/components/EditableTable/index.js
+++ b/packages/bruno-app/src/components/EditableTable/index.js
@@ -16,7 +16,8 @@ const EditableTable = ({
   checkboxKey = 'enabled',
   reorderable = false,
   onReorder,
-  showAddRow = true
+  showAddRow = true,
+  testId = 'editable-table'
 }) => {
   const tableRef = useRef(null);
   const emptyRowUidRef = useRef(null);
@@ -224,7 +225,7 @@ const EditableTable = ({
 
   return (
     <StyledWrapper className={showCheckbox ? 'has-checkbox' : 'no-checkbox'}>
-      <div className="table-container" ref={tableRef}>
+      <div className="table-container" ref={tableRef} data-testid={testId}>
         <table>
           <thead>
             <tr>
@@ -285,6 +286,7 @@ const EditableTable = ({
                         <input
                           type="checkbox"
                           className="mousetrap"
+                          data-testid="column-checkbox"
                           checked={row[checkboxKey] ?? true}
                           onChange={(e) => handleCheckboxChange(row.uid, e.target.checked)}
                         />
@@ -292,14 +294,17 @@ const EditableTable = ({
                     </td>
                   )}
                   {columns.map((column) => (
-                    <td key={column.key}>
+                    <td key={column.key} data-testid={`column-${column.key}`}>
                       {renderCell(column, row, rowIndex)}
                     </td>
                   ))}
                   {showDelete && (
                     <td>
                       {!isEmpty && (
-                        <button onClick={() => handleRemoveRow(row.uid)}>
+                        <button
+                          data-testid="column-delete"
+                          onClick={() => handleRemoveRow(row.uid)}
+                        >
                           <IconTrash strokeWidth={1.5} size={18} />
                         </button>
                       )}
diff --git a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
index 523fcf73d..2da941b0e 100644
--- a/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
+++ b/packages/bruno-app/src/components/RequestPane/Assertions/AssertionOperator/index.js
@@ -81,7 +81,7 @@ const AssertionOperator = ({ operator, onChange }) => {
   };
 
   return (
-    <select value={operator} onChange={handleChange} className="mousetrap">
+    <select value={operator} onChange={handleChange} className="mousetrap" data-testid="assertion-operator-select">
       {operators.map((operator) => (
         <option key={operator} value={operator}>
           {getLabel(operator)}
diff --git a/packages/bruno-app/src/components/RequestPane/Assertions/index.js b/packages/bruno-app/src/components/RequestPane/Assertions/index.js
index 2c12049e3..8bb617f9b 100644
--- a/packages/bruno-app/src/components/RequestPane/Assertions/index.js
+++ b/packages/bruno-app/src/components/RequestPane/Assertions/index.js
@@ -163,6 +163,7 @@ const Assertions = ({ item, collection }) => {
         defaultRow={defaultRow}
         reorderable={true}
         onReorder={handleAssertionDrag}
+        testId="assertions-table"
       />
     </StyledWrapper>
   );
diff --git a/packages/bruno-schema/src/collections/index.js b/packages/bruno-schema/src/collections/index.js
index 495a038a6..908822fd2 100644
--- a/packages/bruno-schema/src/collections/index.js
+++ b/packages/bruno-schema/src/collections/index.js
@@ -33,6 +33,46 @@ const keyValueSchema = Yup.object({
   .noUnknown(true)
   .strict();
 
+const assertionOperators = [
+  'eq',
+  'neq',
+  'gt',
+  'gte',
+  'lt',
+  'lte',
+  'in',
+  'notIn',
+  'contains',
+  'notContains',
+  'length',
+  'matches',
+  'notMatches',
+  'startsWith',
+  'endsWith',
+  'between',
+  'isEmpty',
+  'isNotEmpty',
+  'isNull',
+  'isUndefined',
+  'isDefined',
+  'isTruthy',
+  'isFalsy',
+  'isJson',
+  'isNumber',
+  'isString',
+  'isBoolean',
+  'isArray'
+];
+
+const assertionSchema = keyValueSchema.shape({
+  operator: Yup.string()
+    .oneOf(assertionOperators)
+    .nullable()
+    .optional()
+})
+  .noUnknown(true)
+  .strict();
+
 const varsSchema = Yup.object({
   uid: uidSchema,
   name: Yup.string().nullable(),
@@ -372,7 +412,7 @@ const requestSchema = Yup.object({
     .noUnknown(true)
     .strict()
     .nullable(),
-  assertions: Yup.array().of(keyValueSchema).nullable(),
+  assertions: Yup.array().of(assertionSchema).nullable(),
   tests: Yup.string().nullable(),
   docs: Yup.string().nullable()
 })
@@ -408,7 +448,7 @@ const grpcRequestSchema = Yup.object({
     .noUnknown(true)
     .strict()
     .nullable(),
-  assertions: Yup.array().of(keyValueSchema).nullable(),
+  assertions: Yup.array().of(assertionSchema).nullable(),
   tests: Yup.string().nullable(),
   docs: Yup.string().nullable(),
 })
@@ -446,7 +486,7 @@ const wsRequestSchema = Yup.object({
     .noUnknown(true)
     .strict()
     .nullable(),
-  assertions: Yup.array().of(keyValueSchema).nullable(),
+  assertions: Yup.array().of(assertionSchema).nullable(),
   tests: Yup.string().nullable(),
   docs: Yup.string().nullable()
 })
diff --git a/tests/asserts/add-assertions.spec.ts b/tests/asserts/add-assertions.spec.ts
new file mode 100644
index 000000000..88de8d3d1
--- /dev/null
+++ b/tests/asserts/add-assertions.spec.ts
@@ -0,0 +1,279 @@
+import { test, expect } from '../../playwright';
+import {
+  closeAllCollections,
+  openCollection,
+  openRequest,
+  selectRequestPaneTab,
+  sendRequest,
+  selectEnvironment,
+  addAssertion,
+  editAssertion,
+  deleteAssertion,
+  saveRequest
+} from '../utils/page';
+import { buildCommonLocators } from '../utils/page/locators';
+
+test.describe('Assertions - BRU Collection', () => {
+  test.beforeAll(async ({ pageWithUserData: page }) => {
+    await page.locator('[data-app-state="loaded"]').waitFor({ timeout: 30000 });
+
+    await test.step('Navigate to assertions tab', async () => {
+      await openCollection(page, 'test-assertions-bru');
+      await selectEnvironment(page, 'Local', 'collection');
+      await openRequest(page, 'test-assertions-bru', 'ping');
+      await selectRequestPaneTab(page, 'Assert');
+      await page.waitForTimeout(1000);
+    });
+  });
+
+  test.afterEach(async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    // Ensure we're on the Assertions tab
+    await selectRequestPaneTab(page, 'Assert');
+
+    // Wait for table to be visible
+    await expect(table.container()).toBeVisible();
+
+    // Get all rows and delete assertions (skip the empty row at the end)
+    let rowCount = await table.allRows().count();
+
+    // Keep deleting assertions until only the empty row remains
+    // We delete from the end to avoid index shifting issues
+    while (rowCount > 1) {
+      const deleteButton = table.rowDeleteButton(rowCount - 2); // Second to last (skip empty row)
+
+      await expect(deleteButton).toBeVisible({ timeout: 1000 });
+      await deleteButton.click();
+      // Wait for row count to decrease after deletion
+      await expect(table.allRows()).toHaveCount(rowCount - 1);
+      rowCount = await table.allRows().count(); // Re-count rows
+    }
+
+    // Save the request to persist the clean state
+    // saveRequest already waits for the "Request saved successfully" toast internally
+    await saveRequest(page);
+  });
+
+  test.afterAll(async ({ pageWithUserData: page }) => {
+    await closeAllCollections(page);
+  });
+
+  test('should add assertion to request, verify toast, and run request successfully', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+
+    await test.step('Add assertion to the request', async () => {
+      await addAssertion(page, {
+        expr: 'res.body',
+        value: 'pong'
+      });
+    });
+
+    await test.step('Save request and verify success toast', async () => {
+      await saveRequest(page);
+    });
+
+    await test.step('Send request and verify response', async () => {
+      await sendRequest(page, 200);
+
+      // Verify response status
+      await expect(locators.response.statusCode()).toContainText('200');
+
+      // Verify response body contains "pong"
+      await expect(locators.response.body()).toContainText('pong', { timeout: 5000 });
+    });
+
+    await test.step('Delete assertion and save', async () => {
+      // Navigate back to Assertions tab
+      await selectRequestPaneTab(page, 'Assert');
+
+      // Delete the assertion at row 0 (first data row)
+      await deleteAssertion(page, 0);
+
+      // Save the request
+      await saveRequest(page);
+    });
+  });
+
+  test('should add multiple assertions', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await test.step('Add first assertion', async () => {
+      await addAssertion(page, {
+        expr: 'res.status',
+        value: '200'
+      });
+    });
+
+    await test.step('Add second assertion', async () => {
+      await addAssertion(page, {
+        expr: 'res.body',
+        value: 'pong'
+      });
+    });
+
+    await test.step('Add third assertion', async () => {
+      await addAssertion(page, {
+        expr: 'res.responseTime',
+        value: '1000'
+      });
+    });
+
+    await test.step('Verify all assertions are present', async () => {
+      // Check input values instead of cell text content
+      await expect(table.rowExprInput(0)).toHaveValue('res.status');
+      await expect(table.rowExprInput(1)).toHaveValue('res.body');
+      await expect(table.rowExprInput(2)).toHaveValue('res.responseTime');
+    });
+
+    await test.step('Save request', async () => {
+      await saveRequest(page);
+    });
+  });
+
+  test('should edit an existing assertion', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await test.step('Add initial assertion', async () => {
+      await addAssertion(page, {
+        expr: 'res.body',
+        value: 'ping'
+      });
+    });
+
+    await test.step('Edit the assertion', async () => {
+      await editAssertion(page, 0, {
+        expr: 'res.status',
+        value: '200'
+      });
+    });
+
+    await test.step('Verify assertion was updated', async () => {
+      await expect(table.rowExprInput(0)).toHaveValue('res.status');
+      // The value cell might contain the operator, so we check it contains our value
+      const valueCell = table.rowCell('value', 0);
+      await expect(valueCell).toContainText('200');
+    });
+
+    await test.step('Save request', async () => {
+      await saveRequest(page);
+    });
+  });
+
+  test('should toggle assertion checkbox (enable/disable)', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await test.step('Add assertion', async () => {
+      await addAssertion(page, {
+        expr: 'res.status',
+        value: '200'
+      });
+    });
+
+    await test.step('Verify checkbox is checked by default', async () => {
+      const checkbox = table.rowCheckbox(0);
+      await expect(checkbox).toBeChecked();
+    });
+
+    await test.step('Uncheck the assertion', async () => {
+      const checkbox = table.rowCheckbox(0);
+      await checkbox.uncheck();
+    });
+
+    await test.step('Verify checkbox is unchecked', async () => {
+      const checkbox = table.rowCheckbox(0);
+      await expect(checkbox).not.toBeChecked();
+    });
+
+    await test.step('Re-check the assertion', async () => {
+      const checkbox = table.rowCheckbox(0);
+      await checkbox.check();
+    });
+
+    await test.step('Verify checkbox is checked again', async () => {
+      const checkbox = table.rowCheckbox(0);
+      await expect(checkbox).toBeChecked();
+    });
+
+    await test.step('Save request', async () => {
+      await saveRequest(page);
+    });
+  });
+
+  test('should delete multiple assertions', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await test.step('Add multiple assertions', async () => {
+      await addAssertion(page, { expr: 'res.status', value: '200' });
+      await addAssertion(page, { expr: 'res.body', value: 'pong' });
+      await addAssertion(page, { expr: 'res.responseTime', value: '1000' });
+    });
+
+    await test.step('Verify three assertions exist', async () => {
+      const rowCount = await table.allRows().count();
+      expect(rowCount).toBeGreaterThanOrEqual(3);
+    });
+
+    await test.step('Delete first assertion', async () => {
+      await deleteAssertion(page, 0);
+    });
+
+    await test.step('Delete second assertion (now at index 0 after first deletion)', async () => {
+      await deleteAssertion(page, 0);
+    });
+
+    await test.step('Verify only one assertion remains', async () => {
+      const rowCount = await table.allRows().count();
+      // Should have at least 1 assertion row + 1 empty row
+      expect(rowCount).toBeGreaterThanOrEqual(1);
+    });
+
+    await test.step('Save request', async () => {
+      await saveRequest(page);
+    });
+  });
+
+  test('should add assertion with different operators', async ({ pageWithUserData: page }) => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await test.step('Add assertion with contains operator', async () => {
+      await addAssertion(page, {
+        expr: 'res.body',
+        value: 'pong',
+        operator: 'contains'
+      });
+    });
+
+    await test.step('Add assertion with greater than operator', async () => {
+      await addAssertion(page, {
+        expr: 'res.status',
+        value: '199',
+        operator: 'gt'
+      });
+    });
+
+    await test.step('Add assertion with length operator', async () => {
+      await addAssertion(page, {
+        expr: 'res.body',
+        value: '4',
+        operator: 'length'
+      });
+    });
+
+    await test.step('Verify assertions with different operators exist', async () => {
+      await expect(table.rowExprInput(0)).toHaveValue('res.body');
+      await expect(table.rowExprInput(1)).toHaveValue('res.status');
+      await expect(table.rowExprInput(2)).toHaveValue('res.body');
+    });
+
+    await test.step('Save request', async () => {
+      await saveRequest(page);
+    });
+  });
+});
diff --git a/tests/asserts/fixtures/collection/bruno.json b/tests/asserts/fixtures/collection/bruno.json
new file mode 100644
index 000000000..1ddf97511
--- /dev/null
+++ b/tests/asserts/fixtures/collection/bruno.json
@@ -0,0 +1,6 @@
+{
+  "version": "1",
+  "name": "test-assertions-bru",
+  "type": "collection",
+  "uid": "test-assertions-bru-uid"
+}
\ No newline at end of file
diff --git a/tests/asserts/fixtures/collection/environments/Local.bru b/tests/asserts/fixtures/collection/environments/Local.bru
new file mode 100644
index 000000000..0b756aa68
--- /dev/null
+++ b/tests/asserts/fixtures/collection/environments/Local.bru
@@ -0,0 +1,3 @@
+vars {
+  host: https://testbench-sanity.usebruno.com
+}
\ No newline at end of file
diff --git a/tests/asserts/fixtures/collection/ping.bru b/tests/asserts/fixtures/collection/ping.bru
new file mode 100644
index 000000000..3abc7a2d4
--- /dev/null
+++ b/tests/asserts/fixtures/collection/ping.bru
@@ -0,0 +1,11 @@
+meta {
+  name: ping
+  type: http
+  seq: 1
+}
+
+get {
+  url: {{host}}/ping
+  body: none
+  auth: none
+}
diff --git a/tests/asserts/init-user-data/preferences.json b/tests/asserts/init-user-data/preferences.json
new file mode 100644
index 000000000..36a99c5de
--- /dev/null
+++ b/tests/asserts/init-user-data/preferences.json
@@ -0,0 +1,5 @@
+{
+  "lastOpenedCollections": [
+    "{{projectRoot}}/tests/asserts/fixtures/collection"
+  ]
+}
\ No newline at end of file
diff --git a/tests/utils/page/actions.ts b/tests/utils/page/actions.ts
index 1d27b0c86..40b8f763f 100644
--- a/tests/utils/page/actions.ts
+++ b/tests/utils/page/actions.ts
@@ -705,6 +705,143 @@ const clickResponseAction = async (page: Page, actionTestId: string) => {
   }
 };
 
+type AssertionInput = {
+  expr: string;
+  value: string;
+  operator?: string;
+};
+
+/**
+ * Add an assertion to the current request (adds to the last empty row)
+ * @param page - The page object
+ * @param assertion - The assertion to add (expr, value, optional operator)
+ * @returns The row index where the assertion was added
+ */
+const addAssertion = async (page: Page, assertion: AssertionInput): Promise<number> => {
+  const operator = assertion.operator || 'eq';
+
+  return await test.step(`Add assertion: ${assertion.expr} ${operator} ${assertion.value}`, async () => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    // Ensure assertions table is visible
+    await expect(table.container()).toBeVisible();
+
+    // Find the last row (which is the empty row for adding new assertions)
+    const rowCount = await table.allRows().count();
+    const targetRowIndex = rowCount - 1; // Last row is the empty row
+
+    // Wait for the row to exist
+    await expect(table.row(targetRowIndex)).toBeVisible();
+
+    // Fill in the expression
+    const exprInput = table.rowExprInput(targetRowIndex);
+    await expect(exprInput).toBeVisible({ timeout: 2000 });
+    await exprInput.click();
+    await page.keyboard.type(assertion.expr);
+
+    // The component creates a new empty row when the key field is filled
+    await expect(table.allRows()).toHaveCount(rowCount + 1);
+
+    // Fill in the value first (defaults to 'eq value')
+    const valueInput = table.rowValueInput(targetRowIndex);
+    await valueInput.click();
+    await page.keyboard.type(assertion.value);
+
+    // Select the operator from dropdown (if provided and not default 'eq')
+    // This will update the value field to combine operator + value
+    if (assertion.operator && assertion.operator !== 'eq') {
+      const operatorSelect = table.rowOperatorSelect(targetRowIndex);
+      await operatorSelect.selectOption(assertion.operator);
+    }
+
+    // Wait for the assertion to be fully processed
+    // Verify the expression was actually saved by checking the input value
+    const exprInputAfter = table.rowExprInput(targetRowIndex);
+    await expect(exprInputAfter).toHaveValue(assertion.expr, { timeout: 2000 });
+
+    return targetRowIndex;
+  });
+};
+
+/**
+ * Edit an assertion at a specific row index
+ * @param page - The page object
+ * @param rowIndex - The row index of the assertion to edit
+ * @param assertion - The assertion data to update (expr, value, optional operator)
+ * @returns void
+ */
+const editAssertion = async (page: Page, rowIndex: number, assertion: AssertionInput) => {
+  const operator = assertion.operator || 'eq';
+
+  await test.step(`Edit assertion at row ${rowIndex}: ${assertion.expr} ${operator} ${assertion.value}`, async () => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    // Ensure assertions table is visible
+    await expect(table.container()).toBeVisible();
+
+    // Wait for the row to exist
+    await expect(table.row(rowIndex)).toBeVisible();
+
+    // Update the expression
+    const exprInput = table.rowExprInput(rowIndex);
+    await expect(exprInput).toBeVisible({ timeout: 2000 });
+    await exprInput.click();
+    // Clear the input and type new value - use triple-click to select all (works cross-platform)
+    await exprInput.click({ clickCount: 3 });
+    await page.keyboard.press('Backspace'); // Clear selection
+    await page.keyboard.type(assertion.expr);
+
+    // Update the operator from dropdown (if provided)
+    if (assertion.operator) {
+      const operatorSelect = table.rowOperatorSelect(rowIndex);
+      await operatorSelect.selectOption(assertion.operator);
+    }
+
+    // Update the value (just the value, operator is already selected)
+    // The value cell contains a SingleLineEditor, so we need to click and type
+    const valueInput = table.rowValueInput(rowIndex);
+    await valueInput.click({ clickCount: 3 });
+    await page.keyboard.press('Backspace'); // Clear selection
+    await page.keyboard.type(assertion.value);
+  });
+};
+
+/**
+ * Delete an assertion from the current request by row index
+ * @param page - The page object
+ * @param rowIndex - The row index of the assertion to delete
+ * @returns void
+ */
+const deleteAssertion = async (page: Page, rowIndex: number) => {
+  await test.step(`Delete assertion at row ${rowIndex}`, async () => {
+    const locators = buildCommonLocators(page);
+    const table = locators.assertionsTable();
+
+    await expect(table.container()).toBeVisible();
+
+    const initialRowCount = await table.allRows().count();
+    const deleteButton = table.rowDeleteButton(rowIndex);
+
+    await deleteButton.click();
+    await expect(table.allRows()).toHaveCount(initialRowCount - 1);
+  });
+};
+
+/**
+ * Save the current request and verify success toast
+ * @param page - The page object
+ * @returns void
+ */
+const saveRequest = async (page: Page) => {
+  await test.step('Save request', async () => {
+    await page.keyboard.press('Meta+s');
+    await expect(page.getByText('Request saved successfully').last()).toBeVisible({ timeout: 3000 });
+    await page.waitForTimeout(200);
+  });
+};
+
 export {
   closeAllCollections,
   openCollection,
@@ -732,7 +869,11 @@ export {
   switchResponseFormat,
   switchToPreviewTab,
   switchToEditorTab,
-  clickResponseAction
+  clickResponseAction,
+  addAssertion,
+  editAssertion,
+  deleteAssertion,
+  saveRequest
 };
 
-export type { SandboxMode, EnvironmentType, EnvironmentVariable, ImportCollectionOptions, CreateRequestOptions, CreateUntitledRequestOptions };
+export type { SandboxMode, EnvironmentType, EnvironmentVariable, ImportCollectionOptions, CreateRequestOptions, CreateUntitledRequestOptions, AssertionInput };
diff --git a/tests/utils/page/locators.ts b/tests/utils/page/locators.ts
index f822b1c89..215e9a005 100644
--- a/tests/utils/page/locators.ts
+++ b/tests/utils/page/locators.ts
@@ -102,6 +102,51 @@ export const buildCommonLocators = (page: Page) => ({
     locationInput: () => page.locator('#collection-location'),
     fileInput: () => page.locator('input[type="file"]'),
     envOption: (name: string) => page.locator('.dropdown-item').getByText(name, { exact: true })
+  },
+  /**
+   * Build generic table locators for any table with a testId
+   * @param testId - The testId of the table
+   * @returns Table locators object
+   */
+  table: (testId: string) => {
+    const container = () => page.getByTestId(testId);
+    const getBodyRow = (index?: number) => {
+      const locator = container().locator('tbody tr');
+      return index !== undefined ? locator.nth(index) : locator;
+    };
+
+    return {
+      container,
+      row: (index?: number) => getBodyRow(index),
+      rowCell: (columnKey: string, rowIndex?: number) => {
+        const row = getBodyRow(rowIndex);
+        return row.getByTestId(`column-${columnKey}`);
+      },
+      rowCheckbox: (rowIndex: number) => getBodyRow(rowIndex).getByTestId('column-checkbox'),
+      rowDeleteButton: (rowIndex: number) => getBodyRow(rowIndex).getByTestId('column-delete'),
+      allRows: () => container().locator('tbody tr')
+    };
+  },
+  /**
+   * Assertions table locators (extends generic table with assertion-specific helpers)
+   * @returns Assertions table locators object
+   */
+  assertionsTable: () => {
+    const baseTable = buildCommonLocators(page).table('assertions-table');
+    return {
+      ...baseTable,
+      // Assertion-specific helpers
+      rowExprInput: (rowIndex: number) => {
+        const cell = baseTable.rowCell('name', rowIndex);
+        // Wait for the cell to be visible, then find the textbox
+        return cell.getByRole('textbox').or(cell.locator('input[type="text"]'));
+      },
+      rowOperatorSelect: (rowIndex: number) => {
+        const cell = baseTable.rowCell('operator', rowIndex);
+        return cell.getByTestId('assertion-operator-select').or(cell.locator('select'));
+      },
+      rowValueInput: (rowIndex: number) => baseTable.rowCell('value', rowIndex)
+    };
   }
 });