diff --git a/scripts/library.sh b/scripts/library.sh
index ca33e3111ce..1182c0379ce 100755
--- a/scripts/library.sh
+++ b/scripts/library.sh
@@ -254,19 +254,11 @@ function start_latest_knative_build() {
 #             $2...$n - directories and files to inspect.
 function update_licenses() {
   cd ${REPO_ROOT_DIR} || return 1
-  if [[ ! $PWD =~ (.*)/go/src/(.*) ]]; then
-    echo "ERROR: expected to be under /go/src, but actually in '$PWD'"
-    return 1
-  fi
-  local go_src="/go/src/${BASH_REMATCH[2]}"
   local dst=$1
   shift
   local local_dep_collector="$(which dep-collector)"
-  if [[ -n ${local_dep_collector} ]]; then
-    dep-collector $@ > ./${dst}
-  else
-    docker run -v $PWD:${go_src} --entrypoint sh \
-        gcr.io/knative-tests/test-infra/prow-tests -c \
-        "cd ${go_src} ; dep-collector $@ > ${go_src}/${dst}"
+  if [[ -z ${local_dep_collector} ]]; then
+    go get -u github.com/mattmoor/dep-collector
   fi
+  dep-collector $@ > ./${dst}
 }
diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index f5a8d6ea93a..fb485109330 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -21,11 +21,7 @@
 # Use the flags --build-tests, --unit-tests and --integration-tests
 # to run a specific set of tests.
 
-# 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
+source $(dirname $0)/../scripts/presubmit-tests.sh
 
 function build_tests() {
   header "Running build tests"