diff --git a/ketcher-autotests/tests/Macromolecule-editor/Polymer-Bond-Tool/polymer-bond-tool.spec.ts b/ketcher-autotests/tests/Macromolecule-editor/Polymer-Bond-Tool/polymer-bond-tool.spec.ts
index ba59b7c576..e1bd7f5060 100644
--- a/ketcher-autotests/tests/Macromolecule-editor/Polymer-Bond-Tool/polymer-bond-tool.spec.ts
+++ b/ketcher-autotests/tests/Macromolecule-editor/Polymer-Bond-Tool/polymer-bond-tool.spec.ts
@@ -1,10 +1,12 @@
-import { test } from '@playwright/test';
+import { test, expect } from '@playwright/test';
 import {
   selectSingleBondTool,
   waitForPageInit,
   takePageScreenshot,
+  addMonomerToCanvas,
 } from '@utils';
 import { turnOnMacromoleculesEditor } from '@utils/macromolecules';
+import { bondTwoMonomers } from '@utils/macromolecules/polymerBond';
 /* eslint-disable no-magic-numbers */
 
 test.describe('Polymer Bond Tool', () => {
@@ -90,4 +92,28 @@ test.describe('Polymer Bond Tool', () => {
 
     await takePageScreenshot(page);
   });
+
+  test('Select monomers and pass a bond', async ({ page }) => {
+    /* 
+      Test case: Macro: #3385 - Overlapping of bonds between 2 monomers
+      https://github.com/epam/ketcher/issues/3385 
+      Description: The system shall unable user to create more
+      than 1 bond between the first and the second monomer
+      */
+    const MONOMER_NAME = 'Tza___3-thiazolylalanine';
+    const MONOMER_ALIAS = 'Tza';
+    await addMonomerToCanvas(page, MONOMER_NAME, 300, 300);
+    await addMonomerToCanvas(page, MONOMER_NAME, 500, 500);
+    const peptides = await page.getByText(MONOMER_ALIAS).locator('..');
+    const peptide1 = peptides.nth(0);
+    const peptide2 = peptides.nth(1);
+    await selectSingleBondTool(page);
+    await bondTwoMonomers(page, peptide1, peptide2);
+    await bondTwoMonomers(page, peptide2, peptide1);
+    await page.waitForSelector('#error-tooltip');
+    const errorTooltip = await page.getByTestId('error-tooltip').innerText();
+    const errorMessage =
+      "There can't be more than 1 bond between the first and the second monomer";
+    expect(errorTooltip).toEqual(errorMessage);
+  });
 });
diff --git a/packages/ketcher-core/src/application/editor/tools/Bond.ts b/packages/ketcher-core/src/application/editor/tools/Bond.ts
index e4df12c002..af998f05f4 100644
--- a/packages/ketcher-core/src/application/editor/tools/Bond.ts
+++ b/packages/ketcher-core/src/application/editor/tools/Bond.ts
@@ -168,20 +168,21 @@ class PolymerBond implements BaseTool {
       const firstMonomer = this.bondRenderer?.polymerBond?.firstMonomer;
       const secondMonomer = renderer.monomer;
 
-      for (const key in secondMonomer.attachmentPointsToBonds) {
-        const bond = secondMonomer.attachmentPointsToBonds[key];
-        if (bond !== null) {
-          if (
-            (bond.firstMonomer === firstMonomer &&
-              bond.secondMonomer === secondMonomer) ||
-            (bond.firstMonomer === secondMonomer &&
-              bond.secondMonomer === firstMonomer)
-          ) {
-            this.editor.events.error.dispatch(
-              "There can't be more than 1 bond between the first and the second monomer",
-            );
-            return;
-          }
+      for (const attachmentPoint in secondMonomer.attachmentPointsToBonds) {
+        const bond = secondMonomer.attachmentPointsToBonds[attachmentPoint];
+        if (!bond) {
+          continue;
+        }
+        const alreadyHasBond =
+          (bond.firstMonomer === firstMonomer &&
+            bond.secondMonomer === secondMonomer) ||
+          (bond.firstMonomer === secondMonomer &&
+            bond.secondMonomer === firstMonomer);
+        if (alreadyHasBond) {
+          this.editor.events.error.dispatch(
+            "There can't be more than 1 bond between the first and the second monomer",
+          );
+          return;
         }
       }
 
diff --git a/packages/ketcher-polymer-editor-react/src/Editor.tsx b/packages/ketcher-polymer-editor-react/src/Editor.tsx
index 65a368967c..4d77e45907 100644
--- a/packages/ketcher-polymer-editor-react/src/Editor.tsx
+++ b/packages/ketcher-polymer-editor-react/src/Editor.tsx
@@ -202,7 +202,9 @@ function Editor({ theme }: EditorProps) {
         autoHideDuration={6000}
       >
         <StyledToast id="error-tooltip">
-          <StyledToastContent>{errorTooltipText}</StyledToastContent>
+          <StyledToastContent data-testid="error-tooltip">
+            {errorTooltipText}
+          </StyledToastContent>
           <StyledIconButton
             iconName="close"
             onClick={handleCloseErrorTooltip}