diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index c51b6c9d10f..4ede9b2449a 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -18,15 +18,11 @@
 # It is started by prow for each PR.
 # For convenience, it can also be executed manually.
 
-set -o errexit
-set -o pipefail
-
-# Extensions or file patterns that don't require presubmit tests
-readonly NO_PRESUBMIT_FILES=(\.md \.png ^OWNERS)
-
-source "$(dirname $(readlink -f ${BASH_SOURCE}))/library.sh"
-
-# Helper functions.
+# Load github.com/knative/test-infra/images/prow-tests/scripts/presubmit-tests.sh
+[ -f /workspace/presubmit-tests.sh ] \
+  && source /workspace/presubmit-tests.sh \
+  || eval "$(docker run --entrypoint sh gcr.io/knative-tests/test-infra/prow-tests -c 'cat presubmit-tests.sh')"
+[ -v KNATIVE_TEST_INFRA ] || exit 1
 
 function build_tests() {
   header "TODO(#67): Write build tests"
@@ -40,47 +36,4 @@ function integration_tests() {
   ./test/e2e-tests.sh
 }
 
-# Script entry point.
-
-# Parse script argument:
-# --all-tests or no arguments: run all tests
-# --build-tests: run only the build tests
-# --unit-tests: run only the unit tests
-# --integration-tests: run only the integration tests
-RUN_BUILD_TESTS=0
-RUN_UNIT_TESTS=0
-RUN_INTEGRATION_TESTS=0
-[[ -z "$1" || "$1" == "--all-tests" ]] && RUN_BUILD_TESTS=1 && RUN_UNIT_TESTS=1 && RUN_INTEGRATION_TESTS=1
-[[ "$1" == "--build-tests" ]] && RUN_BUILD_TESTS=1
-[[ "$1" == "--unit-tests" ]] && RUN_UNIT_TESTS=1
-[[ "$1" == "--integration-tests" ]] && RUN_INTEGRATION_TESTS=1
-readonly RUN_BUILD_TESTS
-readonly RUN_UNIT_TESTS
-readonly RUN_INTEGRATION_TESTS
-
-if ! (( RUN_BUILD_TESTS+RUN_UNIT_TESTS+RUN_INTEGRATION_TESTS )); then
-  echo "error: unknown argument $1";
-  exit 1
-fi
-
-cd ${DOCS_ROOT_DIR}
-
-# Skip presubmit tests if whitelisted files were changed.
-if [[ -n "${PULL_PULL_SHA}" ]]; then
-  # On a presubmit job
-  changes="$(git diff --name-only ${PULL_PULL_SHA} ${PULL_BASE_SHA})"
-  no_presubmit_pattern="${NO_PRESUBMIT_FILES[*]}"
-  no_presubmit_pattern="\(${no_presubmit_pattern// /\\|}\)$"
-  echo -e "Changed files in commit ${PULL_PULL_SHA}:\n${changes}"
-  if [[ -z "$(echo "${changes}" | grep -v ${no_presubmit_pattern})" ]]; then
-    # Nothing changed other than files that don't require presubmit tests
-    header "Commit only contains changes that don't affect tests, skipping"
-    exit 0
-  fi
-fi
-
-# Tests to be performed, in the right order if --all-tests is passed.
-
-if (( RUN_BUILD_TESTS )); then build_tests; fi
-if (( RUN_UNIT_TESTS )); then unit_tests; fi
-if (( RUN_INTEGRATION_TESTS )); then integration_tests; fi
+main $@