diff --git a/.github/workflows/cdm-ci.yaml b/.github/workflows/cdm-ci.yaml
index 24153bc2..0ebffd3b 100644
--- a/.github/workflows/cdm-ci.yaml
+++ b/.github/workflows/cdm-ci.yaml
@@ -33,28 +33,36 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: "18"
+
       - name: enforce javascript style standard
         run: npx prettier **/*.js --check
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up Python
-        uses: actions/setup-python@v4
+      - name: code coverage
+        uses: ArtiomTr/jest-coverage-report-action@v2
+        id: coverage
         with:
-          python-version: 3.9
+          output: report-markdown
+          working-directory: queries
 
-      - name: install html to markdown converter
-        run: pip install html2text
+      # - name: Set up Python
+      #   uses: actions/setup-python@v4
+      #   with:
+      #     python-version: 3.9
 
-      - name: check unit tests
-        run: npm test --prefix=queries --coverageDirectory=coverage
+      # - name: install html to markdown converter
+      #   run: pip install html2text
 
-      - name: convert test coverage to markdown
-        run: html2text --ignore-image --ignore-links -b 0 queries/coverage/lcov-report/index.html >> $GITHUB_STEP_SUMMARY
+      # - name: check unit tests
+      #   run: npm test --prefix=queries --coverageDirectory=coverage
 
-      - name: upload coverage html artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: coverage
-          path: queries/coverage
-          if-no-files-found: error
\ No newline at end of file
+      # - name: convert test coverage to markdown
+      #   run: html2text --ignore-image --ignore-links -b 0 queries/coverage/lcov-report/index.html >> $GITHUB_STEP_SUMMARY
+
+      # - name: upload coverage html artifact
+      #   uses: actions/upload-artifact@v3
+      #   with:
+      #     name: coverage
+      #     path: queries/coverage
+      #     if-no-files-found: error
\ No newline at end of file
diff --git a/queries/test/cdm.test.js b/queries/test/cdm.test.js
index 75354834..35f9f6db 100644
--- a/queries/test/cdm.test.js
+++ b/queries/test/cdm.test.js
@@ -1,4 +1,5 @@
 const { describe, expect, test } = require('@jest/globals');
+
 const cdm = require('../cdmq/cdm.js');
 
 describe('set(ish)-array behavior', () => {
@@ -27,5 +28,34 @@ describe('set(ish)-array behavior', () => {
   });
 });
 
+// const { t } = require('tap');
+
+// t.test('set(ish) difference (subtractTwoArrays)', t => {
+//     a0 = [1, 1, 2];
+//     a1 = [2, 2, 3];
+
+//     t.matchOnlyStrict(cdm.subtractTwoArrays(a0, a1), [1, 1]);
+//     t.matchOnlyStrict(cdm.subtractTwoArrays(a1, a0), [3]);
+//     t.end();
+// });
+
+// t.test('set(ish) intersection (intersectTwoArrays)', t => {
+//     a0 = [1, 1, 2];
+//     a1 = [2, 2, 3];
+
+//     t.matchOnlyStrict(cdm.intersectTwoArrays(a0, a1), [2]);
+//     t.matchOnlyStrict(cdm.intersectTwoArrays(a1, a0), [2, 2]);
+//     t.end();
+// });
+
+// t.test('intersect all arrays', t => {
+//     a0 = [1, 1, 2];
+//     a1 = [2, 2, 3];
+//     a2 = [4, 4, 2];
+//     a = [a0, a1, a2];
+//     t.matchOnlyStrict(cdm.intersectAllArrays(a), [2]);
+//     t.end()
+// });
+