diff --git a/Makefile b/Makefile
index 4981329308..2bea7f4d2a 100644
--- a/Makefile
+++ b/Makefile
@@ -12,6 +12,12 @@ install:
 teardown:
 	./hack/teardown.sh
 
+# vendors dependencies which are not able to be automatically
+# pulled in via dep (for instance: Knative Serving for running
+# E2E and upgrade tests, which has no compile-time references).
+vendor:
+	./hack/vendor.sh
+
 # Test targets for CI operator
 test-unit:
 	go test ./knative-operator/...
diff --git a/hack/lib/__sources__.bash b/hack/lib/__sources__.bash
index 390561e264..92b53da3d4 100644
--- a/hack/lib/__sources__.bash
+++ b/hack/lib/__sources__.bash
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-declare -a __sources=(vars common ui scaleup namespaces catalogsource servicemesh serverless)
+declare -a __sources=(vars common ui scaleup namespaces catalogsource servicemesh serverless vendor)
 
 for source in "${__sources[@]}"; do
   # shellcheck disable=SC1091,SC1090
diff --git a/hack/lib/vendor.bash b/hack/lib/vendor.bash
new file mode 100644
index 0000000000..845f7f35e9
--- /dev/null
+++ b/hack/lib/vendor.bash
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash 
+
+function vendor_knative_serving {
+  local version=$1
+  logger.info 'Vendoring knative-serving'
+  if [ -d knative-serving ]; then
+    logger.info "Removing extant knative-serving"
+    rm -rf "knative-serving"
+  fi
+  git clone -b "release-${version}" --depth 1 https://github.com/openshift/knative-serving.git "knative-serving"
+  rm -rf knative-serving/.git
+  if [ ! -f knative-serving/go.mod ]; then
+    logger.info "Priming knative-serving go.mod"
+    echo "module knative.dev/serving" >> knative-serving/go.mod
+  fi
+
+}
+
diff --git a/hack/vendor.sh b/hack/vendor.sh
new file mode 100755
index 0000000000..c6fde43d18
--- /dev/null
+++ b/hack/vendor.sh
@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# Copies into this repository (vendors) packages which are required to exist 
+# locally, but have no compile-time references and are thus out of scope of
+# the dependency manager.
+#
+# shellcheck disable=SC1091,SC1090
+source "$(dirname "${BASH_SOURCE[0]}")/lib/__sources__.bash"
+
+set -Eeuo pipefail
+
+exitcode=0
+
+(( !exitcode )) && vendor_knative_serving "$KNATIVE_VERSION" || exitcode=2
+
+exit $exitcode
diff --git a/test/go.mod b/test/go.mod
new file mode 100644
index 0000000000..17cace0e75
--- /dev/null
+++ b/test/go.mod
@@ -0,0 +1,70 @@
+module github.com/openshift-knative/serverless-operator/test
+
+go 1.13
+
+require (
+	github.com/BurntSushi/toml v0.3.1
+	github.com/PuerkitoBio/purell v1.1.1
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578
+	github.com/davecgh/go-spew v1.1.1
+	github.com/emicklei/go-restful v2.10.0+incompatible
+	github.com/evanphx/json-patch v4.5.0+incompatible
+	github.com/go-openapi/jsonpointer v0.19.3
+	github.com/go-openapi/jsonreference v0.19.3
+	github.com/go-openapi/spec v0.19.3
+	github.com/go-openapi/swag v0.19.5
+	github.com/gogo/protobuf v1.3.0
+	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
+	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6
+	github.com/golang/protobuf v1.3.2
+	github.com/google/go-cmp v0.3.0
+	github.com/google/go-containerregistry v0.0.0-20190619182234-abf9ef06abd9
+	github.com/google/gofuzz v1.0.0
+	github.com/google/licenseclassifier v0.0.0-20190711054124-c3068f13fcc3
+	github.com/googleapis/gnostic v0.3.1
+	github.com/hashicorp/golang-lru v0.5.3
+	github.com/imdario/mergo v0.3.7
+	github.com/json-iterator/go v1.1.7
+	github.com/knative/pkg v0.0.0-20190624141606-d82505e6c5b4
+	github.com/knative/serving v0.7.1
+	github.com/knative/test-infra v0.0.0-20190913000234-ca04b8453a87
+	github.com/konsorten/go-windows-terminal-sequences v1.0.2
+	github.com/mailru/easyjson v0.7.0
+	github.com/mattbaird/jsonpatch v0.0.0-20171005235357-81af80346b1a
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd
+	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742
+	github.com/openshift/client-go v3.9.0+incompatible
+	github.com/openzipkin/zipkin-go v0.2.2
+	github.com/operator-framework/operator-lifecycle-manager v0.0.0-20190913022640-2760276f7858
+	github.com/pkg/errors v0.8.1
+	github.com/sergi/go-diff v1.0.0
+	github.com/sirupsen/logrus v1.4.2
+	github.com/spf13/pflag v1.0.3
+	go.opencensus.io v0.22.2
+	go.uber.org/atomic v1.5.0
+	go.uber.org/multierr v1.4.0
+	go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee
+	go.uber.org/zap v1.13.0
+	golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7
+	golang.org/x/lint v0.0.0-20190930215403-16217165b5de
+	golang.org/x/net v0.0.0-20190912160710-24e19bdeb0f2
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
+	golang.org/x/sys v0.0.0-20190912141932-bc967efca4b8
+	golang.org/x/text v0.3.2
+	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
+	golang.org/x/tools v0.0.0-20191114222411-4191b8cbba09
+	google.golang.org/appengine v1.6.2
+	gopkg.in/inf.v0 v0.9.1
+	gopkg.in/yaml.v2 v2.2.2
+	honnef.co/go/tools v0.0.1-2019.2.3
+	k8s.io/api v0.0.0-20190819141258-3544db3b9e44
+	k8s.io/apimachinery v0.0.0-20190817020851-f2f3a405f61d
+	k8s.io/client-go v0.0.0-20190819141724-e14f31a72a77
+	k8s.io/klog v0.4.0
+	k8s.io/kube-aggregator v0.0.0-20190819142756-13daafd3604f
+	k8s.io/kube-openapi v0.0.0-20190816220812-743ec37842bf
+	k8s.io/utils v0.0.0-20200109141947-94aeca20bf09
+	knative.dev/pkg v0.0.0-20190912234432-34157973944a
+	knative.dev/serving-operator v0.11.1
+	sigs.k8s.io/yaml v1.1.0
+)
diff --git a/test/lib.bash b/test/lib.bash
index e0eaba7615..b7deb20ac7 100644
--- a/test/lib.bash
+++ b/test/lib.bash
@@ -144,17 +144,15 @@ function run_knative_serving_rolling_upgrade_tests {
   # Save the rootdir before changing dir
   rootdir="$(dirname "$(dirname "$(realpath "${BASH_SOURCE[0]}")")")"
 
-  if [[ -z ${KNATIVE_SERVING_HOME+x} ]]; then
-    checkout_knative_serving "$knative_version"
-  fi
-  cd "$KNATIVE_SERVING_HOME" || return $?
+  cd "knative-serving"
 
   prepare_knative_serving_tests || return $?
 
   local failed=0
   image_template="registry.svc.ci.openshift.org/openshift/knative-${knative_version}:knative-serving-test-{{.Name}}"
 
-  go_test_e2e -tags=preupgrade -timeout=20m ./test/upgrade \
+  export GO111MODULE=on
+  go_test_e2e -mod vendor -tags=preupgrade -timeout=20m ./test/upgrade \
     --imagetemplate "$image_template" \
     --kubeconfig "$KUBECONFIG" \
     --resolvabledomain || return 1
@@ -229,8 +227,6 @@ function run_knative_serving_rolling_upgrade_tests {
 
   oc delete ksvc pizzaplanet-upgrade-service scale-to-zero-upgrade-service upgrade-probe -n serving-tests
 
-  remove_temporary_gopath
-
   return 0
   )
 }
@@ -388,3 +384,4 @@ function delete_users {
   done < "users.htpasswd"
   rm -v users.htpasswd
 }
+