diff --git a/hack/update-codegen.sh b/hack/update-codegen.sh
index f730a19cb8f..a3db51e58d8 100755
--- a/hack/update-codegen.sh
+++ b/hack/update-codegen.sh
@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-source $(dirname $0)/../vendor/github.com/tektoncd/plumbing/scripts/library.sh
+source $(git rev-parse --show-toplevel)/vendor/github.com/tektoncd/plumbing/scripts/library.sh
 
 # generate the code with:
 # --output-base    because this script should also be able to run inside the vendor dir of
diff --git a/hack/update-deps.sh b/hack/update-deps.sh
index 3fbe4ec98d8..3576f2b173d 100755
--- a/hack/update-deps.sh
+++ b/hack/update-deps.sh
@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-source $(dirname $0)/../vendor/github.com/tektoncd/plumbing/scripts/library.sh
+source $(git rev-parse --show-toplevel)/vendor/github.com/tektoncd/plumbing/scripts/library.sh
 
 cd ${REPO_ROOT_DIR}
 
diff --git a/hack/verify-codegen.sh b/hack/verify-codegen.sh
index 969c2794db8..ae3037cd970 100755
--- a/hack/verify-codegen.sh
+++ b/hack/verify-codegen.sh
@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-source $(dirname $0)/../vendor/github.com/tektoncd/plumbing/scripts/library.sh
+source $(git rev-parse --show-toplevel)/vendor/github.com/tektoncd/plumbing/scripts/library.sh
 
 readonly TMP_DIFFROOT="$(mktemp -d ${REPO_ROOT_DIR}/tmpdiffroot.XXXXXX)"
 
diff --git a/test/e2e-common.sh b/test/e2e-common.sh
index edbf6d3e7f0..897f0a8f33f 100755
--- a/test/e2e-common.sh
+++ b/test/e2e-common.sh
@@ -16,7 +16,7 @@
 
 # Helper functions for E2E tests.
 
-source $(dirname $0)/../vendor/github.com/tektoncd/plumbing/scripts/e2e-tests.sh
+source $(git rev-parse --show-toplevel)/vendor/github.com/tektoncd/plumbing/scripts/e2e-tests.sh
 
 function teardown() {
     subheader "Tearing down Tekton Pipelines"
diff --git a/test/e2e-tests-upgrade.sh b/test/e2e-tests-upgrade.sh
index 56e9b320f2c..cce0c60bd89 100755
--- a/test/e2e-tests-upgrade.sh
+++ b/test/e2e-tests-upgrade.sh
@@ -24,7 +24,7 @@
 # Scenario 2: install the previous release, create the pipelines and tasks, upgrade
 # to the current release, and validate whether the Tekton pipeline works.
 
-source $(dirname $0)/e2e-common.sh
+source $(git rev-parse --show-toplevel)/test/e2e-common.sh
 PREVIOUS_PIPELINE_VERSION=v0.5.2
 
 # Script entry point.
diff --git a/test/e2e-tests-yaml.sh b/test/e2e-tests-yaml.sh
index 6fd160b2d5e..064be59e4fd 100755
--- a/test/e2e-tests-yaml.sh
+++ b/test/e2e-tests-yaml.sh
@@ -17,8 +17,7 @@
 # This script calls out to scripts in tektoncd/plumbing to setup a cluster
 # and deploy Tekton Pipelines to it for running integration tests.
 
-go get -d github.com/GoogleCloudPlatform/cloud-builders/gcs-fetcher/cmd/gcs-fetcher
-source $(dirname $0)/e2e-common.sh
+source $(git rev-parse --show-toplevel)/test/e2e-common.sh
 
 # Script entry point.
 
diff --git a/test/e2e-tests.sh b/test/e2e-tests.sh
index ac249899bbe..e9ef0e877f6 100755
--- a/test/e2e-tests.sh
+++ b/test/e2e-tests.sh
@@ -17,7 +17,7 @@
 # This script calls out to scripts in tektoncd/plumbing to setup a cluster
 # and deploy Tekton Pipelines to it for running integration tests.
 
-source $(dirname $0)/e2e-common.sh
+source $(git rev-parse --show-toplevel)/test/e2e-common.sh
 
 # Script entry point.
 
diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index 77435e52bcf..2042ab57201 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -26,7 +26,7 @@
 export DISABLE_MD_LINTING=1
 export DISABLE_MD_LINK_CHECK=1
 
-source $(dirname $0)/../vendor/github.com/tektoncd/plumbing/scripts/presubmit-tests.sh
+source $(git rev-parse --show-toplevel)/vendor/github.com/tektoncd/plumbing/scripts/presubmit-tests.sh
 
 function post_build_tests() {
   header "running golangci-lint"