diff --git a/.gitlab/.gitlab-ci.yml b/.gitlab/.gitlab-ci.yml
index 96bb298..330e7b5 100644
--- a/.gitlab/.gitlab-ci.yml
+++ b/.gitlab/.gitlab-ci.yml
@@ -43,6 +43,24 @@ test-images-job/valid_set:
     PACKAGE_NAME: "valid_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 .gitlab/node_job/
+    - npm install ajv ajv-errors mocha mocha-steps chai
+    - cd ../..
+    - node .gitlab/node_job/node_modules/mocha/bin/_mocha --require mocha-steps --colors .gitlab/node_job/wppChecker.js
+
+test-manifest-job/valid_set:
+  variables:
+    PACKAGE_NAME: "valid_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
   stage: Bundle
diff --git a/src/test_manifest_job/wppChecker.js b/src/test_manifest_job/wppChecker.js
index 7fc1364..7421385 100644
--- a/src/test_manifest_job/wppChecker.js
+++ b/src/test_manifest_job/wppChecker.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