The cluster-image-registry-operator repository has one test that is very flaky: TestImageRegistryRemovedWithImages

Error message:
error: build error: After retrying 2 times, Pull image still failed due to error: initializing source docker://image-registry.openshift-image-registry.svc:5000/openshift/nodejs@sha256:abf20982aa1390efd9b5fdbb988e4eed4bf057e71038bebfb6244b1ad1c8f498: pinging container registry image-registry.openshift-image-registry.svc:5000: Get "https://image-registry.openshift-image-registry.svc:5000/v2/": x509: certificate signed by unknown authority

Example of a failed job: https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift_cluster-image-registry-operator/816/pull-ci-openshift-cluster-image-registry-operator-master-e2e-aws-operator/1595874398231859200

Current failures: https://search.ci.openshift.org/?search=FAIL%3A+TestImageRegistryRemovedWithImages&maxAge=336h&context=1&type=bug%2Bissue%2Bjunit&name=pull-ci-openshift-cluster-image-registry-operator-master-e2e-.*operator&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job

Test: https://github.com/openshift/cluster-image-registry-operator/blob/13471c888ed00d28989cba458b80b5b14685d89e/test/e2e/removed_test.go#L22