diff --git a/.circleci/README.md b/.circleci/README.md
index 5544fe06a..b340d82ce 100644
--- a/.circleci/README.md
+++ b/.circleci/README.md
@@ -189,13 +189,13 @@ Tests run in this sequence (see `commands.run_tests` around [config.yml:153-170]
 
 ### Test Structure
 
-**End-to-end tests** ([_tests/e2e-test.mjs](../_tests/e2e-test.mjs)):
+**End-to-end tests** ([tests/e2e-test.mjs](../tests/e2e-test.mjs)):
 1. Creates new publication via `quire new`
 2. Builds HTML via `quire build`
 3. Generates PDF via `quire pdf`
 4. Generates EPUB via `quire epub`
 
-**Browser tests** ([_tests/publication.spec.js](../_tests/publication.spec.js)):
+**Browser tests** ([tests/publication.spec.js](../tests/publication.spec.js)):
 - Run twice per platform: once at root path `/` and once with pathname `/quire-test-project/`
 - Validate page titles, image URLs, IIIF canvas-panel dimensions
 - Use sitemap for page discovery
@@ -342,7 +342,7 @@ circleci config process .circleci/config.yml  # Expand orbs/anchors
 ```bash
 npx playwright test --headed              # See browser
 npx playwright test --debug               # Step through
-npx playwright test _tests/publication.spec.js  # Single file
+npx playwright test tests/publication.spec.js  # Single file
 ```
 
 **Failed test locally:**
diff --git a/.circleci/build.yml b/.circleci/build.yml
index 7484415d4..d2c0b0a8f 100644
--- a/.circleci/build.yml
+++ b/.circleci/build.yml
@@ -188,7 +188,7 @@ commands:
             - reports
             - test-publication-pathname/_site
             - test-publication/_site
-            - _tests
+            - tests
 
       - store_test_results:
           path: reports
diff --git a/DEVELOPMENT.md b/DEVELOPMENT.md
index 42d3c309b..4ae31d868 100644
--- a/DEVELOPMENT.md
+++ b/DEVELOPMENT.md
@@ -151,7 +151,7 @@ mise pw:debug             # Interactive debug mode
 
 **Test specific file:**
 ```bash
-npx playwright test _tests/publication.spec.js
+npx playwright test tests/publication.spec.js
 ```
 
 **View test report:**
diff --git a/package.json b/package.json
index 48a713a0e..1d00e505a 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "environmentVariables": {},
     "failFast": true,
     "files": [
-      "./_tests/*-test.mjs"
+      "./tests/*-test.mjs"
     ],
     "workerThreads": false
   },
diff --git a/playwright.config.js b/playwright.config.js
index 90ba2a04f..7717818f7 100644
--- a/playwright.config.js
+++ b/playwright.config.js
@@ -8,7 +8,7 @@ const pathnameTesting = !!process.env.QUIRE_TEST_PUB_PATHNAME
  */
 export default defineConfig({
   expect: { toHaveScreenshot: { maxDiffPixels: 100 } },
-  testDir: './_tests',
+  testDir: './tests',
   /* Run tests in files in parallel */
   fullyParallel: true,
   /* Fail the build on CI if you accidentally left test.only in the source code. */
diff --git a/_tests/README.md b/tests/README.md
similarity index 100%
rename from _tests/README.md
rename to tests/README.md
diff --git a/_tests/e2e-test.mjs b/tests/e2e-test.mjs
similarity index 100%
rename from _tests/e2e-test.mjs
rename to tests/e2e-test.mjs
diff --git a/_tests/helpers/publication-setup.js b/tests/helpers/publication-setup.js
similarity index 100%
rename from _tests/helpers/publication-setup.js
rename to tests/helpers/publication-setup.js
diff --git a/_tests/publication.spec.js b/tests/publication.spec.js
similarity index 100%
rename from _tests/publication.spec.js
rename to tests/publication.spec.js