diff --git a/src/lib/sollinhaChatPanelWidth.ts b/src/lib/sollinhaChatPanelWidth.ts
index f263cdf6..8758f48d 100644
--- a/src/lib/sollinhaChatPanelWidth.ts
+++ b/src/lib/sollinhaChatPanelWidth.ts
@@ -44,7 +44,7 @@ export const clearSavedChatWidthPx = (): void => {
 }
 
 const clamp = (value: number, min: number, max: number): number =>
-  Math.min(Math.max(value, min), Math.max(min, max))
+  Math.min(Math.max(value, min), max)
 
 /** Default open width: 25% of the group, capped at `CHAT_DEFAULT_MAX_PX`. */
 export const defaultChatWidthPx = (groupWidthPx: number): number =>
@@ -52,7 +52,9 @@ export const defaultChatWidthPx = (groupWidthPx: number): number =>
 
 /**
  * Width for the next open: the remembered choice wins (even above the cap),
- * otherwise the capped 25% default. Always bounded to `[CHAT_MIN_PX, group]`.
+ * otherwise the capped 25% default. Bounded to `CHAT_MIN_PX` and to the group
+ * itself — a group narrower than the floor (degenerate layout) yields the
+ * group width, and the library re-clamps the rendered panel at its `minSize`.
  */
 export const resolveChatPanelWidthPx = (groupWidthPx: number, savedPx: number | null): number =>
   savedPx === null ? defaultChatWidthPx(groupWidthPx) : clamp(savedPx, CHAT_MIN_PX, groupWidthPx)
diff --git a/tests/e2e/campaignSollinhaWidth.e2e.spec.ts b/tests/e2e/campaignSollinhaWidth.e2e.spec.ts
index 0aa6df28..0c848098 100644
--- a/tests/e2e/campaignSollinhaWidth.e2e.spec.ts
+++ b/tests/e2e/campaignSollinhaWidth.e2e.spec.ts
@@ -29,6 +29,7 @@ const panelWidth = (panel: Locator) => panel.evaluate((element) => element.clien
 
 const dragSeparatorBy = async (page: Page, deltaX: number) => {
   const separator = chatSeparator(page)
+  await expect(separator).toBeVisible()
   const box = (await separator.boundingBox())!
   await page.mouse.move(box.x + box.width / 2, box.y + box.height / 2)
   await page.mouse.down()
@@ -65,12 +66,14 @@ test.describe('B166 — largura padrão do chat Sollinha com teto no desktop', (
     const resizedWidth = await panelWidth(panel)
 
     // The chosen size was saved locally: a page reload reopens at it, not at
-    // the capped default.
+    // the capped default. Poll against the dragged size (the raw 25% first
+    // paint would already pass a bare ">360" gate, so wait for the restore).
     await page.reload()
     await expect(panel).toBeVisible()
-    await expect.poll(() => panelWidth(panel)).toBeGreaterThan(360)
+    await expect
+      .poll(async () => Math.abs((await panelWidth(panel)) - resizedWidth))
+      .toBeLessThanOrEqual(4)
     const restoredWidth = await panelWidth(panel)
-    expect(Math.abs(restoredWidth - resizedWidth)).toBeLessThanOrEqual(4)
 
     // Reopening via the header button (acceptance 1 — "pelo botão") restores
     // the same remembered width instead of a fresh cap.
@@ -83,8 +86,8 @@ test.describe('B166 — largura padrão do chat Sollinha com teto no desktop', (
       .getByRole('button', { name: 'Sollinha — Assistente virtual' })
       .filter({ visible: true })
       .click()
-    await expect.poll(() => panelWidth(panel)).toBeGreaterThan(360)
-    const buttonOpenWidth = await panelWidth(panel)
-    expect(Math.abs(buttonOpenWidth - restoredWidth)).toBeLessThanOrEqual(4)
+    await expect
+      .poll(async () => Math.abs((await panelWidth(panel)) - restoredWidth))
+      .toBeLessThanOrEqual(4)
   })
 })
diff --git a/tests/unit/sollinhaChatPanelWidth.unit.spec.ts b/tests/unit/sollinhaChatPanelWidth.unit.spec.ts
index 71ce2233..9dd27730 100644
--- a/tests/unit/sollinhaChatPanelWidth.unit.spec.ts
+++ b/tests/unit/sollinhaChatPanelWidth.unit.spec.ts
@@ -59,6 +59,10 @@ describe('defaultChatWidthPx', () => {
     expect(defaultChatWidthPx(1000)).toBe(CHAT_MIN_PX)
     expect(defaultChatWidthPx(700)).toBe(CHAT_MIN_PX)
   })
+
+  it('yields the group width for a group narrower than the floor', () => {
+    expect(defaultChatWidthPx(200)).toBe(200)
+  })
 })
 
 describe('resolveChatPanelWidthPx', () => {
@@ -78,4 +82,8 @@ describe('resolveChatPanelWidthPx', () => {
   it('clamps a saved choice below the floor up to CHAT_MIN_PX', () => {
     expect(resolveChatPanelWidthPx(1920, 150)).toBe(CHAT_MIN_PX)
   })
+
+  it('yields the group width for a saved choice on a group narrower than the floor', () => {
+    expect(resolveChatPanelWidthPx(200, 520)).toBe(200)
+  })
 })