diff --git a/.gitlab/.gitlab-ci.yml b/.gitlab/.gitlab-ci.yml
index 4c24508..beaa3cc 100644
--- a/.gitlab/.gitlab-ci.yml
+++ b/.gitlab/.gitlab-ci.yml
@@ -6,39 +6,71 @@ stages:
   - Release
 
 variables:
-  ENTRY_FOLDER: "test"
+  ENTRY_FOLDER: "test" # test directory for testing CI/CD, or assets directory for normal operations
   RELEASE_VERSION: v0.$CI_PIPELINE_IID
   PACKAGE_REGISTRY_URL: "${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/generic/${PACKAGE_NAME}/${RELEASE_VERSION}"
 
+# TODO: to reenable later
 # Jobs from here run on Merge Requests as prerequisite for merging.
-.gen-manifest-job: &gen-manifest
+.manifest-job: &manifest
   stage: Manifest
   rules:
     - if: $CI_PIPELINE_SOURCE == "merge_request_event"
       changes:
         # TODO: refacto this (as Reference or something else)
-        - test/${PACKAGE_NAME}/*
+        - ${ENTRY_FOLDER}/${PACKAGE_NAME}/*
   script:
     - echo generating manifest for ${ENTRY_FOLDER}/${PACKAGE_NAME}
 
-gen-manifest-job/valid_set:
-  variables:
-    PACKAGE_NAME: "valid_set"
-  <<: *gen-manifest
+# manifest-job/valid_set:
+#   variables:
+#     PACKAGE_NAME: "valid_set"
+#   <<: *gen-manifest
 
-.check-content-job: &check-content
+.test-images-job: &test-images
   stage: Test
+  image: python:latest
   rules:
     - if: $CI_PIPELINE_SOURCE == "merge_request_event"
       changes:
         - ${ENTRY_FOLDER}/${PACKAGE_NAME}/*
   script:
-    - echo testing ${ENTRY_FOLDER}/${PACKAGE_NAME}
+    - pip install -U pytest pillow iteration_utilities
+    - python -m pytest src/test_images_job/test_wpp.py --tb=line -rA --color=yes --code-highlight=yes -q
+  allow_failure: true
 
-check-content-job/valid_set:
+test-images-job/valid_set:
   variables:
     PACKAGE_NAME: "valid_set"
-  <<: *check-content
+  <<: *test-images
+
+test-images-job/missing_tag_set:
+  variables:
+    PACKAGE_NAME: "missing_tag_set"
+  <<: *test-images
+
+.test-manifest-job: &test-manifest
+  stage: Test
+  image: node:latest
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+      changes:
+        - ${ENTRY_FOLDER}/${PACKAGE_NAME}/*
+  script:
+    - cd src/test_manifest_job
+    - npm install ajv ajv-errors mocha mocha-steps chai
+    - cd ../..
+    - node src/test_manifest_job/node_modules/mocha/bin/_mocha --require mocha-steps --colors src/test_manifest_job/wpp_checker.js
+
+test-manifest-job/valid_set:
+  variables:
+    PACKAGE_NAME: "valid_set"
+  <<: *test-manifest
+
+test-manifest-job/missing_tag_set:
+  variables:
+    PACKAGE_NAME: "missing_tag_set"
+  <<: *test-manifest
 
 # Jobs from here run Merged_results or Push/Merge Commits to the main branch. Tag is created on release so no run with tag creation
 .bundle-job: &bundle
@@ -63,6 +95,11 @@ bundle-job/valid_set:
     PACKAGE_NAME: "valid_set"
   <<: *bundle
 
+bundle-job/missing_tag_set:
+  variables:
+    PACKAGE_NAME: "missing_tag_set"
+  <<: *bundle
+
 .upload-job: &upload
   stage: Distribute
   image: curlimages/curl:latest
@@ -78,12 +115,19 @@ bundle-job/valid_set:
       --header "JOB-TOKEN: ${CI_JOB_TOKEN}" \
       --upload-file ${PACKAGE_NAME}.zip "${PACKAGE_REGISTRY_URL}/${PACKAGE_NAME}.zip?select=package_file"
 
-# upload-job/valid_set:
-#   needs:
-#     - bundle-job/valid_set
-#   variables:
-#     PACKAGE_NAME: "valid_set"
-#   <<: *upload
+upload-job/valid_set:
+  needs:
+    - bundle-job/valid_set
+  variables:
+    PACKAGE_NAME: "valid_set"
+  <<: *upload
+
+upload-job/missing_tag_set:
+  needs:
+    - bundle-job/missing_tag_set
+  variables:
+    PACKAGE_NAME: "missing_tag_set"
+  <<: *upload
 
 .release-job: &release
   stage: Release
@@ -105,9 +149,17 @@ bundle-job/valid_set:
       links:
         - name: ${PACKAGE_NAME}
           url: "${PACKAGE_REGISTRY_URL}/${PACKAGE_NAME}.zip"
-# release-job/valid_set:
-#   needs:
-#     - upload-job/valid_set
-#   variables:
-#     PACKAGE_NAME: "valid_set"
-#   <<: *release
+
+release-job/valid_set:
+  needs:
+    - upload-job/valid_set
+  variables:
+    PACKAGE_NAME: "valid_set"
+  <<: *release
+
+release-job/missing_tag_set:
+  needs:
+    - upload-job/missing_tag_set
+  variables:
+    PACKAGE_NAME: "missing_tag_set"
+  <<: *release
diff --git a/src/test_images_job/test_wpp.py b/src/test_images_job/test_wpp.py
index 3bdda88..f12b1fa 100644
--- a/src/test_images_job/test_wpp.py
+++ b/src/test_images_job/test_wpp.py
@@ -46,8 +46,8 @@ def validate_brightness_image(working_path, theme_config, high_light, image_list
 @pytest.fixture
 def working_path():
 	# get the global variables containing gitlab-given project slug.
-	project_slug = os.environ["WPP_SLUG"]
-	root_folder = os.environ["WPP_ROOT"]
+	project_slug = os.environ["PACKAGE_NAME"]
+	root_folder = os.environ["ENTRY_FOLDER"]
 	working_path = Path(root_folder, project_slug)
 	if not working_path.is_dir():
 		raise FileNotFoundError(f"No project found for the given {working_path}.")
@@ -76,7 +76,6 @@ def test_image_size(working_path, manifest):
 	assert w >= h, "✖ Image orientation is portrait (must be landscape or square)"
 	# print(f"✔ Images are big enough ({w}×{h}) and landscape.")
 
-
 def test_overlapping_images(manifest):
 	jointed_lists = manifest.get("dayImageList")
 	jointed_lists.extend(manifest.get("nightImageList"))
diff --git a/src/test_manifest_job/wppChecker.js b/src/test_manifest_job/wpp_checker.js
similarity index 54%
rename from src/test_manifest_job/wppChecker.js
rename to src/test_manifest_job/wpp_checker.js
index 7fc1364..7421385 100644
--- a/src/test_manifest_job/wppChecker.js
+++ b/src/test_manifest_job/wpp_checker.js
@@ -3,21 +3,21 @@ const path = require("path");
 const { env, exit } = require("process");
 const expect = require("chai").expect;
 const Ajv = require("ajv").default;
-const ajv = new Ajv({allErrors: true});
+const ajv = new Ajv({ allErrors: true });
 require("ajv-errors")(ajv);
 
 //let root, slug;
 //let workingDirectory = path.join(root, slug);
 //console.log(`👷‍♂️ Working with ‘${slug}’ slug.`);
 
-const themeSchemaFile = ".gitlab/node_job/json_theme_schema.jsonc";
+const themeSchemaFile = "src/test_manifest_job/json_theme_schema.jsonc";
 let wppManifest;
 let validator;
 let files;
 
 function leftOuterJoin(leftArray, rightArray) {
-    return leftArray.filter(function(el) {
-        return this.indexOf(el) < 0; 
+    return leftArray.filter(function (el) {
+        return this.indexOf(el) < 0;
     }, rightArray);
 }
 
@@ -25,7 +25,7 @@ function flatReferences(wppManifest) {
     allImageIds = [
         wppManifest.dayHighlight,
         wppManifest.nightHighlight,
-        ...wppManifest.dayImageList, 
+        ...wppManifest.dayImageList,
         ...wppManifest.nightImageList,
         ...(wppManifest.sunsetImageList || []),
         ...(wppManifest.sunriseImageList || [])
@@ -35,42 +35,42 @@ function flatReferences(wppManifest) {
     });
 }
 
-describe('Mandatory Checks', function() {
-    before(function() {
-        slug = env.WPP_SLUG;
+describe('Mandatory Checks', function () {
+    before(function () {
+        slug = env.PACKAGE_NAME;
         expect(slug).to.be.a("string").that.is.not.empty;
-        root = env.WPP_ROOT;
+        root = env.ENTRY_FOLDER;
         expect(root).to.be.a("string").that.is.not.empty;
         workingDirectory = path.join(root, slug);
         files = fs.readdirSync(workingDirectory);
         expect(files).to.be.an('array').that.is.not.empty;
         validator = ajv.compile(JSON.parse(fs.readFileSync(themeSchemaFile, 'utf8')));
-    }); 
+    });
 
-    step('Manifest is an existing json file', function() {
+    step('Manifest is an existing json file', function () {
         wppManifest = JSON.parse(fs.readFileSync(path.join(workingDirectory, "theme.json"), "utf8"));
     });
 
-    step('Manifest passes the schema', function() {
+    step('Manifest passes the schema', function () {
         const isValid = validator(wppManifest);
-        if(!isValid) expect.fail(`\n\t• ${validator.errors.map(el => {return el.message;}).join('\n\t• ')}`);
+        if (!isValid) expect.fail(`\n\t• ${validator.errors.map(el => { return el.message; }).join('\n\t• ')}`);
     });
 
-    step('There are no missing files', function() {
+    step('There are no missing files', function () {
         let references = flatReferences(wppManifest);
         references.push("theme.json");
         missings = leftOuterJoin(references, files);
-        expect(missings, 
-            `The following reference${(missings.length > 1)? "s": ""} from theme.json ${(missings.length > 1)? "are": "is"} missing in the pack. Consider adding ${(missings.length > 1)? "them": " it"} to the pack or removing the reference${(missings.length > 1)? "s": ""} from the theme.json:\n\t• ${missings.join('\n\t• ')}\n`
-            ).to.be.lengthOf(0, );
+        expect(missings,
+            `The following reference${(missings.length > 1) ? "s" : ""} from theme.json ${(missings.length > 1) ? "are" : "is"} missing in the pack. Consider adding ${(missings.length > 1) ? "them" : " it"} to the pack or removing the reference${(missings.length > 1) ? "s" : ""} from the theme.json:\n\t• ${missings.join('\n\t• ')}\n`
+        ).to.be.lengthOf(0,);
     });
 
-    step('There are no orphan files', function() {
+    step('There are no orphan files', function () {
         let references = flatReferences(wppManifest);
         orphans = leftOuterJoin(files.filter(x => x !== "theme.json"), references);
         expect(orphans,
-            `The following orphan file${(orphans.length > 1)? "s are": " is"} not referenced in this theme.json. Consider removing the file${(orphans.length > 1)? "s": ""} or referencing ${(orphans.length > 1)? "them": "it"} in the theme.json:\n\t• ${orphans.join('\n\t• ')}\n`
-            ).to.be.lengthOf(0);
+            `The following orphan file${(orphans.length > 1) ? "s are" : " is"} not referenced in this theme.json. Consider removing the file${(orphans.length > 1) ? "s" : ""} or referencing ${(orphans.length > 1) ? "them" : "it"} in the theme.json:\n\t• ${orphans.join('\n\t• ')}\n`
+        ).to.be.lengthOf(0);
     });
 
 });
\ No newline at end of file
diff --git a/test/missing_tag_set/bl3_landscape_1.jpg b/test/missing_tag_set/bl3_landscape_1.jpg
new file mode 100644
index 0000000..3e48b8b
Binary files /dev/null and b/test/missing_tag_set/bl3_landscape_1.jpg differ
diff --git a/test/missing_tag_set/bl3_landscape_2.jpg b/test/missing_tag_set/bl3_landscape_2.jpg
new file mode 100644
index 0000000..e69683f
Binary files /dev/null and b/test/missing_tag_set/bl3_landscape_2.jpg differ
diff --git a/test/missing_tag_set/bl3_landscape_3.jpg b/test/missing_tag_set/bl3_landscape_3.jpg
new file mode 100644
index 0000000..9fa97bb
Binary files /dev/null and b/test/missing_tag_set/bl3_landscape_3.jpg differ
diff --git a/test/missing_tag_set/bl3_landscape_4.jpg b/test/missing_tag_set/bl3_landscape_4.jpg
new file mode 100644
index 0000000..4c3da38
Binary files /dev/null and b/test/missing_tag_set/bl3_landscape_4.jpg differ
diff --git a/test/missing_tag_set/theme.json b/test/missing_tag_set/theme.json
new file mode 100644
index 0000000..3add1bb
--- /dev/null
+++ b/test/missing_tag_set/theme.json
@@ -0,0 +1,14 @@
+{
+    "imageFilename": "bl3_landscape_*.jpg",
+    "imageCredits": "© Gearbox",
+    "displayName": "",
+    "dayImageList": [
+        2
+    ],
+    "sunsetImageList": [
+        2
+    ],
+    "nightImageList": [
+        3
+    ]
+}
\ No newline at end of file
diff --git a/test/valid_set/theme.json b/test/valid_set/theme.json
new file mode 100644
index 0000000..24eadf2
--- /dev/null
+++ b/test/valid_set/theme.json
@@ -0,0 +1,19 @@
+{
+    "imageFilename": "bl2_eridum_badlands_*.jpg",
+    "imageCredits": "Gearbox",
+    "displayName": "",
+    "dayHighlight": 1,
+    "nightHighlight": 3,
+    "sunriseImageList": [
+        4
+    ],
+    "dayImageList": [
+        1
+    ],
+    "sunsetImageList": [
+        2
+    ],
+    "nightImageList": [
+        3
+    ]
+}
\ No newline at end of file