diff --git a/tests/e2e/campaignHomeActions.e2e.spec.ts b/tests/e2e/campaignHomeActions.e2e.spec.ts
index 7ce7948b..7ff2b712 100644
--- a/tests/e2e/campaignHomeActions.e2e.spec.ts
+++ b/tests/e2e/campaignHomeActions.e2e.spec.ts
@@ -82,17 +82,22 @@ test.describe('Início — busca global (B47)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    // Claimed, never hardcoded: parallel specs sharing one seeded municipality
+    // raced each other's mutations on it (miss #73).
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
     const search = page.getByLabel('Buscar na campanha')
-    await search.fill('Cairu')
+    await search.fill(municipality.name)
 
     const group = page.getByRole('region', { name: 'Resultados da busca' })
     await expect(group.getByRole('heading', { name: 'Municípios' })).toBeVisible({
       timeout: 15000,
     })
-    await group.getByRole('link', { name: /Cairu/i }).click()
-    await page.waitForURL(/\/campanha\/municipios\/cairu/)
+    // Disambiguate by href, not by name: catalog names are not prefix-unique
+    // ("Conde" also matches "Condeúba" — the unanchored-regex lesson).
+    await group.locator(`a[href$="/campanha/municipios/${municipality.slug}"]`).click()
+    await page.waitForURL(new RegExp(`^https?://[^/]+/campanha/municipios/${municipality.slug}$`))
   })
 })
 
@@ -158,20 +163,26 @@ test.describe('Wizard — busca município (B60)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
     await page.goto('/campanha/acoes/atualizar-votos')
     await expect(page.getByRole('heading', { name: WIZARD_MUNICIPALITY_STEP_TITLE })).toBeVisible()
 
     const search = page.getByLabel('Buscar município')
-    await search.fill('Cairu')
+    await search.fill(municipality.name)
 
     const results = page.getByRole('region', { name: 'Resultados da busca' })
-    await expect(results.getByRole('link', { name: /Cairu/i })).toBeVisible({ timeout: 15000 })
-    await results.getByRole('link', { name: /Cairu/i }).click()
+    const hit = results.locator(`a[href*="municipio=${municipality.slug}"]`)
+    await expect(hit).toBeVisible({ timeout: 15000 })
+    await hit.click()
 
-    await page.waitForURL(/\/campanha\/acoes\/atualizar-votos\?municipio=cairu/)
-    await expect(page.getByLabel(/Município em atualização: Cairu/i)).toBeVisible()
+    await page.waitForURL(
+      new RegExp(`^https?://[^/]+/campanha/acoes/atualizar-votos\\?municipio=${municipality.slug}$`),
+    )
+    await expect(
+      page.getByLabel(new RegExp(`^Município em atualização: ${municipality.name}`, 'i')),
+    ).toBeVisible()
     await expect(page.getByRole('heading', { name: 'Ajustar votos estimados' })).toBeVisible()
   })
 })
@@ -188,9 +199,10 @@ test.describe('Wizard — ajuste de votos (B61 / B77)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/atualizar-votos?municipio=cairu')
+    await page.goto(`/campanha/acoes/atualizar-votos?municipio=${municipality.slug}`)
 
     const step = wizardVoteStep(page)
     await expect(page.getByRole('heading', { name: 'Ajustar votos estimados' })).toBeVisible({
@@ -217,9 +229,10 @@ test.describe('Wizard — ajuste de votos (B61 / B77)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/atualizar-votos?municipio=cairu')
+    await page.goto(`/campanha/acoes/atualizar-votos?municipio=${municipality.slug}`)
 
     await expect(page.getByRole('heading', { name: 'Ajustar votos estimados' })).toBeVisible({
       timeout: 15000,
@@ -239,11 +252,18 @@ test.describe('Wizard — ajuste de votos (B61 / B77)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/atualizar-votos?municipio=cairu&cenario=pessimistic')
+    await page.goto(
+      `/campanha/acoes/atualizar-votos?municipio=${municipality.slug}&cenario=pessimistic`,
+    )
 
-    await page.waitForURL(/\/campanha\/acoes\/atualizar-votos\?municipio=cairu$/)
+    await page.waitForURL(
+      new RegExp(
+        `^https?://[^/]+/campanha/acoes/atualizar-votos\\?municipio=${municipality.slug}$`,
+      ),
+    )
     await expect(page.getByRole('heading', { name: 'Ajustar votos estimados' })).toBeVisible({
       timeout: 15000,
     })
@@ -256,10 +276,11 @@ test.describe('Wizard — atualizar liderança (B70)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
     const suffix = Date.now().toString().slice(-8).padStart(8, '0')
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/atualizar-lideranca?municipio=cairu')
+    await page.goto(`/campanha/acoes/atualizar-lideranca?municipio=${municipality.slug}`)
 
     await expect(page.getByRole('heading', { name: 'Quem coordena por aqui?' })).toBeVisible({
       timeout: 15000,
@@ -293,8 +314,10 @@ test.describe('Wizard — registrar sinal (B63)', () => {
       name: fixtures.value('Coordenadora Geral'),
     })
 
+    const municipality = await fixtures.claimMunicipality()
+
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/registrar-sinal?municipio=cairu')
+    await page.goto(`/campanha/acoes/registrar-sinal?municipio=${municipality.slug}`)
 
     await expect(page.getByRole('heading', { name: 'Que tipo de sinal?' })).toBeVisible({
       timeout: 15000,
@@ -319,9 +342,10 @@ test.describe('Wizard — registrar sinal (B63)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/registrar-sinal?municipio=cairu')
+    await page.goto(`/campanha/acoes/registrar-sinal?municipio=${municipality.slug}`)
 
     await expect(page.getByRole('heading', { name: 'Que tipo de sinal?' })).toBeVisible({
       timeout: 15000,
@@ -341,9 +365,12 @@ test.describe('Wizard — registrar sinal (B63)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/registrar-sinal?municipio=cairu&entry=update-votes')
+    await page.goto(
+      `/campanha/acoes/registrar-sinal?municipio=${municipality.slug}&entry=update-votes`,
+    )
 
     await expect(page.getByRole('link', { name: 'Pular registro de sinal' })).toBeVisible({
       timeout: 15000,
diff --git a/tests/e2e/campaignWizardChrome.e2e.spec.ts b/tests/e2e/campaignWizardChrome.e2e.spec.ts
index 4fb42995..c7256755 100644
--- a/tests/e2e/campaignWizardChrome.e2e.spec.ts
+++ b/tests/e2e/campaignWizardChrome.e2e.spec.ts
@@ -35,9 +35,12 @@ test.describe('Wizard — header mobile (B75)', () => {
     const coordinator = await fixtures.createCampaignUser('coordinator', {
       name: fixtures.value('Coordenadora Geral'),
     })
+    // Claimed, never hardcoded: parallel specs sharing one seeded municipality
+    // raced each other's mutations on it (miss #73).
+    const municipality = await fixtures.claimMunicipality()
 
     await campaign.login(page, coordinator.email!, coordinator.password)
-    await page.goto('/campanha/acoes/atualizar-votos?municipio=cairu')
+    await page.goto(`/campanha/acoes/atualizar-votos?municipio=${municipality.slug}`)
 
     await expect(page.getByRole('heading', { name: 'Ajustar votos estimados' })).toBeVisible({
       timeout: 15000,
@@ -45,7 +48,9 @@ test.describe('Wizard — header mobile (B75)', () => {
 
     const topBar = page.locator('[data-slot="campaign-mobile-top-bar"][data-mode="wizard"]')
     await expect(topBar.getByText('Ajustar votos', { exact: true })).toBeVisible()
-    await expect(topBar.getByLabel(/Município em atualização: Cairu/i)).toBeVisible()
+    await expect(
+      topBar.getByLabel(new RegExp(`^Município em atualização: ${municipality.name}`, 'i')),
+    ).toBeVisible()
     await expect(page.getByRole('link', { name: /Voltar/ })).toBeVisible()
 
     await page.getByRole('link', { name: /Voltar/ }).click()
diff --git a/tests/int/homeSearchStateDeputies.int.spec.ts b/tests/int/homeSearchStateDeputies.int.spec.ts
index f27691b1..18ee529a 100644
--- a/tests/int/homeSearchStateDeputies.int.spec.ts
+++ b/tests/int/homeSearchStateDeputies.int.spec.ts
@@ -68,11 +68,13 @@ describe('searchHomeStateDeputies (B52)', () => {
     const fixtures = campaignFixtures()
     const coordinator = await fixtures.createCampaignUser('coordinator')
     const stateDeputy = await fixtures.createStateDeputy({ name: 'Carteira Dobradinha' })
-    const cairu = await fixtures.getMunicipality('cairu')
-    const feira = await fixtures.getMunicipality('feira-de-santana')
+    // Allocated, never pinned slugs: parallel specs mutating the same seeded
+    // municipality deadlocked municipality_rels (miss #73).
+    const first = await fixtures.getMunicipality()
+    const second = await fixtures.getMunicipality()
     await setStateDeputyMunicipalitiesBatchRecord(payload, coordinator, {
       stateDeputyId: stateDeputy.id,
-      municipalityIds: [cairu.id, feira.id],
+      municipalityIds: [first.id, second.id],
       assigned: true,
     })
 
diff --git a/tests/int/municipalityPageData.int.spec.ts b/tests/int/municipalityPageData.int.spec.ts
index 73dfd09c..d0edfa7b 100644
--- a/tests/int/municipalityPageData.int.spec.ts
+++ b/tests/int/municipalityPageData.int.spec.ts
@@ -5,6 +5,7 @@ import { getPayload } from 'payload'
 import { beforeAll, describe, expect, it } from 'vitest'
 
 import { getMunicipalityCatalogEntry, municipalityCatalog } from '@/lib/municipalityCatalog'
+import { territorialClassSortWeight } from '@/lib/territorialClassSortWeight'
 import config from '@/payload.config'
 import { loadMunicipalityListPageBundle } from '@/utilities/municipality/municipalityPageData'
 import { computeMunicipalityTerritorialClass } from '@/utilities/municipality/municipalityTerritorialClass'
@@ -287,19 +288,27 @@ describe('loadMunicipalityListPageBundle', () => {
     const fixtures = campaignFixtures()
     const coordinator = await fixtures.createCampaignUser('coordinator')
 
-    const redutoEntry = municipalityCatalog.find(
-      (entry) => computeMunicipalityTerritorialClass(entry.slug).class === 'reduto',
-    )!
-    const marginalEntry = municipalityCatalog.find(
-      (entry) => computeMunicipalityTerritorialClass(entry.slug).class === 'marginal',
-    )!
-    const reduto = await fixtures.getMunicipality(redutoEntry.slug)
-    const marginal = await fixtures.getMunicipality(marginalEntry.slug)
+    // Two allocated municipalities with DISTINCT territorial classes: the
+    // behavior pinned here (class filter narrows, totals stay honest, classe
+    // sort follows the weight table) does not care WHICH classes they are —
+    // and pinning fixed catalog slugs raced parallel specs mutating the same
+    // seeded rows (deadlock on municipality_rels, miss #73).
+    const first = await fixtures.getMunicipality()
+    const firstClass = computeMunicipalityTerritorialClass(first.slug).class
+    let second = await fixtures.getMunicipality()
+    let secondClass = computeMunicipalityTerritorialClass(second.slug).class
+    for (let attempt = 0; secondClass === firstClass && attempt < 20; attempt++) {
+      second = await fixtures.getMunicipality()
+      secondClass = computeMunicipalityTerritorialClass(second.slug).class
+    }
+    if (secondClass === firstClass) {
+      throw new Error('could not allocate municipalities of two distinct classes')
+    }
 
     const marker = `e10-classe-${Date.now()}`
     for (const [municipality, suffix] of [
-      [reduto, 'reduto'],
-      [marginal, 'marginal'],
+      [first, 'filtrada'],
+      [second, 'fora'],
     ] as const) {
       await payload.update({
         collection: 'municipality',
@@ -313,29 +322,39 @@ describe('loadMunicipalityListPageBundle', () => {
 
     const filtered = await loadMunicipalityListPageBundle(payload, coordinator, {
       q: marker,
-      class: 'reduto',
+      class: firstClass,
     })
-    expect(filtered.municipalities.map((row) => row.slug)).toEqual([reduto.slug])
+    expect(filtered.municipalities.map((row) => row.slug)).toEqual([first.slug])
     expect(filtered.totalDocs).toBe(1)
     expect(filtered.overview?.municipalityCount).toBe(1)
-    expect(filtered.municipalities[0]!.territorialClass).toBe('reduto')
+    expect(filtered.municipalities[0]!.territorialClass).toBe(firstClass)
     expect(filtered.municipalities[0]!.territorialClassFactors.length).toBeGreaterThan(0)
 
     // A native sort key would otherwise let Payload paginate before the class
     // filter runs, which would hand back a short page with an inflated total.
     const byName = await loadMunicipalityListPageBundle(payload, coordinator, {
       q: marker,
-      class: 'reduto',
+      class: firstClass,
       sort: 'name',
     })
-    expect(byName.municipalities.map((row) => row.slug)).toEqual([reduto.slug])
+    expect(byName.municipalities.map((row) => row.slug)).toEqual([first.slug])
     expect(byName.totalDocs).toBe(1)
 
     const sorted = await loadMunicipalityListPageBundle(payload, coordinator, {
       q: marker,
       sort: 'classe',
     })
-    expect(sorted.municipalities.map((row) => row.slug)).toEqual([reduto.slug, marginal.slug])
+    // `classe` sorts strongest class first (reduto 4 … marginal 1; every
+    // catalog row classes into a weighted class, so no null weight exists).
+    const expectedOrder = [first, second]
+      .map((municipality) => ({
+        slug: municipality.slug,
+        weight:
+          territorialClassSortWeight[computeMunicipalityTerritorialClass(municipality.slug).class],
+      }))
+      .sort((left, right) => (right.weight ?? 0) - (left.weight ?? 0))
+      .map((entry) => entry.slug)
+    expect(sorted.municipalities.map((row) => row.slug)).toEqual(expectedOrder)
   })
 
   /**
@@ -348,9 +367,9 @@ describe('loadMunicipalityListPageBundle', () => {
     const fixtures = campaignFixtures()
     const coordinator = await fixtures.createCampaignUser('coordinator')
 
-    const low = await fixtures.getMunicipality(municipalityCatalog[0]!.slug)
-    const high = await fixtures.getMunicipality(municipalityCatalog[1]!.slug)
-    const none = await fixtures.getMunicipality(municipalityCatalog[2]!.slug)
+    const low = await fixtures.getMunicipality()
+    const high = await fixtures.getMunicipality()
+    const none = await fixtures.getMunicipality()
 
     const marker = `e14-nivel-${Date.now()}`
     for (const [municipality, suffix, engagementLevel] of [
@@ -446,9 +465,7 @@ describe('loadMunicipalityListPageBundle', () => {
       data: { priority: 'alta' },
       overrideAccess: true,
     })
-    const covered = await fixtures.getMunicipality(
-      municipalityCatalog.find((entry) => entry.slug !== priorityMunicipality.slug)!.slug,
-    )
+    const covered = await fixtures.getMunicipality()
     await fixtures.assignMunicipalityAdvisors(covered.id, [advisor.id])
 
     // "Prioritária" lives in the Município popover, so it must not hide the