Update PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -8,17 +8,35 @@ Note: Make sure your branch is rebased to the latest upstream master.
 
 **Description of the change:**
 
-
 **Motivation for the change:**
 
+**Architectural changes:**
+
+<!--
+If necessary, briefly describe any architectural changes, other options considered, and/or link to any EPs or design docs
+-->
+
+**Testing remarks:**
+
+<!--
+Call out any information around how you've tested the code change that may be useful for reviewers. For instance:
+ * any edge-cases you have (dis)covered
+ * how you have reproduced and tested for regressions in bug fixes
+ * how you've tested for flakes in e2e tests or flake fixes
+-->
+
 **Reviewer Checklist**
 - [ ] Implementation matches the proposed design, or proposal is updated to match implementation
 - [ ] Sufficient unit test coverage
 - [ ] Sufficient end-to-end test coverage
+- [ ] Bug fixes are accompanied by regression test(s)
+- [ ] e2e tests and flake fixes are accompanied evidence of flake testing, e.g. executing the test 100(0) times
+- [ ] tech debt/todo is accompanied by issue link(s) in comments in the surrounding code
+- [ ] Tests are comprehensible, e.g. Ginkgo DSL is being used appropriately
 - [ ] Docs updated or added to `/doc`
 - [ ] Commit messages sensible and descriptive
-- [ ] Tests marked as `[FLAKE]` are truly flaky
-- [ ] Tests that remove the `[FLAKE]` tag are no longer flaky
+- [ ] Tests marked as `[FLAKE]` are truly flaky and have an issue
+- [ ] Code is properly formatted
 
 
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