diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index e1954d8..42a009c 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -68,7 +68,8 @@
         "kavod-io.vscode-jest-test-adapter",
         "nilobarp.javascript-test-runner",
         "vespa-dev-works.jestRunIt",
-        "andys8.jest-snippets"
+        "andys8.jest-snippets",
+        "trunk.io"
       ]
     }
   }
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..e4ebfc7
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,5 @@
+README.md
+test-project
+definition-manifest.json
+.vscode
+.npmignore
diff --git a/test/cron-parsing.test.ts b/test/cron-parsing.test.ts
index 9f3da87..3e3553b 100644
--- a/test/cron-parsing.test.ts
+++ b/test/cron-parsing.test.ts
@@ -123,6 +123,12 @@ describe('cron parsing tests', function () {
     );
   });
 
+  it('parse cron 30 8 * 1-5,9-12 0,6', function () {
+    // this should mean the same as "30 8 * 1-5,9-12 7,6"
+    const result = parseCronParts('30 8 * 1-5,9-12 0,6');
+    expect(result.english).eql('At 00:00 on day-of-month 1 and 15 and on Wednesday');
+  });
+
   it('parse cron 0 0 1,15 * 3', function () {
     const result = parseCronParts('0 0 1,15 * 3');
     expect(result.english).eql('At 00:00 on day-of-month 1 and 15 and on Wednesday');