diff --git a/.circleci/config.yml b/.circleci/config.yml
index 908349ba..b184d9b2 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -169,7 +169,7 @@ jobs:
           name: Restore Docker image cache
           command: |
             docker load -i /tmp/cache/autopush-integration-tests.tar
-            docker tag autopush-integration-tests:build integration-tests
+            docker tag autopush-integration-tests integration-tests
       - run:
           name: Integration tests (Bigtable)
           command: |
@@ -330,12 +330,12 @@ jobs:
           docker_layer_caching: true
       - run:
           name: Build Image
-          command: docker build -t << parameters.image >>:build -f ./tests/<< parameters.path >>/Dockerfile .
+          command: docker build -t << parameters.image >> -f ./tests/<< parameters.path >>/Dockerfile .
       - run:
           name: Save Docker Image to Workspace
           command: |
             mkdir -p /tmp/cache
-            docker save -o /tmp/cache/<< parameters.image >>.tar << parameters.image >>:build
+            docker save -o /tmp/cache/<< parameters.image >>.tar << parameters.image >>
       - persist_to_workspace:
           root: /tmp/cache
           paths:
@@ -360,12 +360,12 @@ jobs:
             docker buildx build --target planner -f ./tests/<< parameters.path >>/Dockerfile .
             docker buildx build --target cacher -f ./tests/<< parameters.path >>/Dockerfile .
             docker buildx build --target builder -f ./tests/<< parameters.path >>/Dockerfile .
-            docker buildx build --target integration-tests -t << parameters.image >>:build -f ./tests/<< parameters.path >>/Dockerfile .
+            docker buildx build --target integration-tests -t << parameters.image >> -f ./tests/<< parameters.path >>/Dockerfile .
       - run:
           name: Save Docker Image to Workspace
           command: |
             mkdir -p /tmp/cache
-            docker save -o /tmp/cache/<< parameters.image >>.tar << parameters.image >>:build
+            docker save -o /tmp/cache/<< parameters.image >>.tar << parameters.image >>
       - persist_to_workspace:
           root: /tmp/cache
           paths:
@@ -415,8 +415,8 @@ jobs:
             fi
               echo "export GAR_IMAGE=\"<<parameters.registry-url>>/${GCP_GAR_PROJECT_ID}/${GCP_GAR_REPO}/<<parameters.image>>\"" >> $BASH_ENV
               source $BASH_ENV
-              docker tag <<parameters.image>>:<<parameters.build_tag>> $GAR_IMAGE:$GAR_TAG
-              docker tag <<parameters.image>>:<<parameters.build_tag>> $GAR_IMAGE:latest
+              docker tag <<parameters.image>> $GAR_IMAGE:$GAR_TAG
+              docker tag <<parameters.image>> $GAR_IMAGE:latest
       # push-image parameters:
       # https://circleci.com/developer/orbs/orb/circleci/gcp-gcr#commands-push-image
       - gcp-gcr/push-image:
@@ -457,7 +457,7 @@ workflows:
 
       - build:
           name: build-autoconnect
-          image: autoconnect:build
+          image: autoconnect
           crate: autoconnect
           binary: autoconnect
           filters:
@@ -466,7 +466,7 @@ workflows:
 
       - build:
           name: build-autoendpoint
-          image: autoendpoint:build
+          image: autoendpoint
           crate: autoendpoint
           binary: autoendpoint
           filters:
@@ -482,7 +482,7 @@ workflows:
       - build-test-container:
           name: Build End-To-End Test Image
           image: autopush-end-to-end-tests
-          path: end-to-end
+          path: notification
           filters:
             tags:
               only: /.*/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9f36eade..08927c03 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -24,11 +24,13 @@ Before submitting a PR:
   your reviewer's responsibility to ensure your patch includes adequate tests.
 
 When submitting a PR:
+- **[Sign all your git commits](https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification#ssh-commit-verification)**.
+  We cannot accept any PR that does not have all commits signed. This is a policy
+  put in place by our Security Operations team and is enforced by our CI processes.
 - You agree to license your code under the project's open source license
   ([MPL 2.0](/LICENSE)).
 - Base your branch off the current `master`.
 - Add both your code and new tests if relevant.
-- Sign your git commit.
 - Run the test suite to make sure your code passes linting and tests.
 - Ensure your changes do not reduce code coverage of the test suite.
 - Please do not include merge commits in pull requests; include only commits
@@ -93,5 +95,5 @@ passed and the commit message is properly formatted.
 BREAKING CHANGE: This patch requires developer to lower expectations about
     what "delicious" and "cookie" may mean. Some sadness may result.
 
-Closes #3.14, #9.75
+Closes #314, #975
 ```
diff --git a/Makefile b/Makefile
index d93c336d..e337b879 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,9 @@
 SHELL := /bin/sh
 CARGO = cargo
-TESTS_DIR := tests
+# For unknown reasons, poetry on CI will sometimes "forget" what it's current path is, which
+# can confuse relative path lookups.
+# Let's be very explicit about it for now.
+TESTS_DIR := `pwd`/tests
 TEST_RESULTS_DIR ?= workspace/test-results
 PYTEST_ARGS ?= $(if $(SKIP_SENTRY),-m "not sentry") $(if $(TEST_STUB),,-m "not stub") # Stub tests do not work in CI
 INTEGRATION_TEST_DIR := $(TESTS_DIR)/integration
diff --git a/PR_TEMPLATE.md b/PR_TEMPLATE.md
index 1413835a..d5fb4717 100644
--- a/PR_TEMPLATE.md
+++ b/PR_TEMPLATE.md
@@ -2,6 +2,8 @@
 
 Describe these changes.
 
+> **NOTE:** We can only accept PRS with all commits [signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification#ssh-commit-verification). PRs that contain _any_ unsigned commits will not be accepted and the PR _must_ be resubmitted. If this is something you cannot provide, please disclose and a team member _may_ duplicate the PR as signed for you (depending on availablity and priority. Thank you for your understanding and cooperation.)
+
 ## Testing
 
 How should reviewers test?