diff --git a/.github/workflows/build-steps.yml b/.github/workflows/build-steps.yml
index 3df19770d8..b50008beab 100644
--- a/.github/workflows/build-steps.yml
+++ b/.github/workflows/build-steps.yml
@@ -19,22 +19,50 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  pre-check:
+    runs-on: ubuntu-latest
+    outputs: 
+      # Expose matched filters as job 'packages' output variable
+      packages: ${{ steps.filter.outputs.changes }}
+
+    steps:
+      - uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          # &common and &browser are YAML anchors
+          # *common and *browser references previously defined anchor
+          # browser/node filter will match any path under common as well as their own
+          # angular/react filter will match any path under common and browser as well as their own
+          filters: |
+            core:
+              - 'lib/msal-core/**/**.!(md)'
+              - '.github/workflows/build-steps.yml'
+            common: &common
+              - 'lib/msal-common/**/**.!(md)'
+              - '.github/workflows/build-steps.yml'
+            browser: &browser
+              - *common
+              - 'lib/msal-browser/**/**.!(md)'
+            node:
+              - *common
+              - 'lib/msal-node/**/**.!(md)'
+            angular:
+              - *browser
+              - 'lib/msal-angular/**/**.!(md)'
+            react:
+              - *browser
+              - 'lib/msal-react/**/**.!(md)'
 
   build-test:
+    needs: pre-check
     runs-on: ubuntu-latest
-    env: 
-      NOT_FROM_FORK: (github.repository == 'AzureAD/microsoft-authentication-library-for-js') && ((github.event.pull_request.head.repo.full_name == github.repository) || (github.event_name == 'push'))
 
     strategy:
         fail-fast: false
         matrix:
-          library:
-            - msal-core
-            - msal-common
-            - msal-browser
-            - msal-node
-            - msal-angular
-            - msal-react
+          # Parse JSON array containing names of all filters matching any of changed files
+          # e.g. ['package1', 'package2'] if both package folders contains changes
+          library: ${{ fromJSON(needs.pre-check.outputs.packages) }}
   
     steps:
     - uses: actions/checkout@v2
@@ -48,35 +76,20 @@ jobs:
       run: npm ci
 
     - name: Build packages
-      working-directory: lib/${{ matrix.library }}
+      working-directory: lib/msal-${{ matrix.library }}
       run: npm run build:all
 
     - name: Lint
-      working-directory: lib/${{ matrix.library }}
+      working-directory: lib/msal-${{ matrix.library }}
       run: npm run lint
 
     - name: Unit Tests with coverage
-      working-directory: lib/${{ matrix.library }}
+      working-directory: lib/msal-${{ matrix.library }}
       run: npm run test:coverage
 
-    - name: Coveralls
-      if: success() && ${{ env.NOT_FROM_FORK == 'true' }}
-      uses: coverallsapp/github-action@master
-      with:
-        github-token: ${{ secrets.github_token }}
-        flag-name: ${{ matrix.library }}
-        base-path: lib/${{ matrix.library }}
-        path-to-lcov: lib/${{ matrix.library }}/coverage/lcov.info
-        parallel: true
-
-  Coveralls:
-    needs: build-test
-    runs-on: ubuntu-latest
-    if: (github.repository == 'AzureAD/microsoft-authentication-library-for-js') && ((github.event.pull_request.head.repo.full_name == github.repository) || (github.event_name == 'push'))
-
-    steps:
-    - name: Coveralls Finished
-      uses: coverallsapp/github-action@master
+    - name: Upload Test Coverage to CodeCov
+      if: success()
+      uses: codecov/codecov-action@v1
       with:
-        github-token: ${{ secrets.github_token }}
-        parallel-finished: true
+        files: lib/msal-${{matrix.library}}/coverage/lcov.info
+        flags: msal-${{ matrix.library }}
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000000..442558f603
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,11 @@
+comment:
+  layout: "flags, files"
+  behavior: default
+  require_changes: false  
+  require_base: no
+  require_head: no
+  show_carryforward_flags: true
+
+flag_management:
+  default_rules:
+    carryforward: true
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 7a91237121..7494764fbe 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4368,19 +4368,6 @@
         "parse-json": "^4.0.0"
       }
     },
-    "coveralls": {
-      "version": "3.0.9",
-      "resolved": "https://registry.npmjs.org/coveralls/-/coveralls-3.0.9.tgz",
-      "integrity": "sha512-nNBg3B1+4iDox5A5zqHKzUTiwl2ey4k2o0NEcVZYvl+GOSJdKBj4AJGKLv6h3SvWch7tABHePAQOSZWM9E2hMg==",
-      "dev": true,
-      "requires": {
-        "js-yaml": "^3.13.1",
-        "lcov-parse": "^1.0.0",
-        "log-driver": "^1.2.7",
-        "minimist": "^1.2.0",
-        "request": "^2.88.0"
-      }
-    },
     "cp-file": {
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/cp-file/-/cp-file-6.2.0.tgz",
@@ -7832,12 +7819,6 @@
       "integrity": "sha512-eTIzlVOSUR+JxdDFepEYcBMtZ9Qqdef+rnzWdRZuMbOywu5tO2w2N7rqjoANZ5k9vywhL6Br1VRjUIgTQx4E8w==",
       "dev": true
     },
-    "lcov-parse": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/lcov-parse/-/lcov-parse-1.0.0.tgz",
-      "integrity": "sha1-6w1GtUER68VhrLTECO+TY73I9+A=",
-      "dev": true
-    },
     "lerna": {
       "version": "3.22.1",
       "resolved": "https://registry.npmjs.org/lerna/-/lerna-3.22.1.tgz",
@@ -7976,12 +7957,6 @@
       "integrity": "sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=",
       "dev": true
     },
-    "log-driver": {
-      "version": "1.2.7",
-      "resolved": "https://registry.npmjs.org/log-driver/-/log-driver-1.2.7.tgz",
-      "integrity": "sha512-U7KCmLdqsGHBLeWqYlFA0V0Sl6P08EE1ZrmA9cxjUE0WVqT9qnyVDPz1kzpFEP0jdJuFnasWIfSd7fsaNXkpbg==",
-      "dev": true
-    },
     "loose-envify": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
diff --git a/package.json b/package.json
index 73f8fb7d58..30c726b925 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,6 @@
     "@typescript-eslint/parser": "^4.0.1",
     "babel-plugin-istanbul": "^5.2.0",
     "beachball": "^1.45.0",
-    "coveralls": "3.0.9",
     "dotenv": "^8.2.0",
     "eslint": "^7.8.1",
     "eslint-plugin-header": "^3.1.0",