diff --git a/Gopkg.lock b/Gopkg.lock
index 3ae7a064f107..30cf565f969e 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -347,11 +347,11 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:851129618684df5fe963fd5fe7bf75efb28e9adde03855d836cfe1a9ed1e5f4a"
+  digest = "1:4d691ff60dc78ba976789a94661167acbb29a9bcf342ac7f77d8dda603f0f023"
   name = "github.com/knative/test-infra"
   packages = ["."]
   pruneopts = "T"
-  revision = "f53c40459b2d126c32f5139ee0d9251748ad6dd8"
+  revision = "d9996f1f958db6e7425e4f5a752e9412cf8df98f"
 
 [[projects]]
   branch = "master"
diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index e54a475b964e..19166fc5ebab 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -33,11 +33,9 @@ function build_tests() {
   go test -run=^$ -tags=e2e ./test/... || result=1
   subheader "Checking autogenerated code is up-to-date"
   ./hack/verify-codegen.sh || result=1
-  subheader "Checking for forbidden licenses"
-  # Fetch the google/licenseclassifier for its license db
-  go get github.com/google/licenseclassifier
   # Check that we don't have any forbidden licenses in our images.
-  dep-collector -check ./cmd/* || result=1
+  subheader "Checking for forbidden licenses"
+  check_licenses ./cmd/* || result=1
   return ${result}
 }
 
diff --git a/vendor/github.com/knative/test-infra/scripts/library.sh b/vendor/github.com/knative/test-infra/scripts/library.sh
index 5936fde1d83c..d202384f8203 100755
--- a/vendor/github.com/knative/test-infra/scripts/library.sh
+++ b/vendor/github.com/knative/test-infra/scripts/library.sh
@@ -44,7 +44,8 @@ function make_banner() {
 
 # Simple header for logging purposes.
 function header() {
-  make_banner "=" "${1^^}"
+  local upper="$(echo $1 | tr a-z A-Z)"
+  make_banner "=" "${upper}"
 }
 
 # Simple subheader for logging purposes.
@@ -259,6 +260,16 @@ function start_latest_knative_build() {
   wait_until_pods_running knative-build || return 1
 }
 
+# Run dep-collector, installing it first if necessary.
+# Parameters: $1..$n - parameters passed to dep-collector.
+function run_dep_collector() {
+  local local_dep_collector="$(which dep-collector)"
+  if [[ -z ${local_dep_collector} ]]; then
+    go get -u github.com/mattmoor/dep-collector
+  fi
+  dep-collector $@
+}
+
 # Run dep-collector to update licenses.
 # Parameters: $1 - output file, relative to repo root dir.
 #             $2...$n - directories and files to inspect.
@@ -266,11 +277,16 @@ function update_licenses() {
   cd ${REPO_ROOT_DIR} || return 1
   local dst=$1
   shift
-  local local_dep_collector="$(which dep-collector)"
-  if [[ -z ${local_dep_collector} ]]; then
-    go get -u github.com/mattmoor/dep-collector
-  fi
-  dep-collector $@ > ./${dst}
+  run_dep_collector $@ > ./${dst}
+}
+
+# Run dep-collector to check for forbidden liceses.
+# Parameters: $1...$n - directories and files to inspect.
+function check_licenses() {
+  # Fetch the google/licenseclassifier for its license db
+  go get -u github.com/google/licenseclassifier
+  # Check that we don't have any forbidden licenses in our images.
+  run_dep_collector -check $@
 }
 
 # Check links in all .md files in the repo.