diff --git a/hack/.shellcheck_failures b/hack/.shellcheck_failures
index f7fa9e12744..5f18a508476 100644
--- a/hack/.shellcheck_failures
+++ b/hack/.shellcheck_failures
@@ -42,7 +42,6 @@
 ./hack/verify-codegen.sh
 ./hack/verify-golint.sh
 ./hack/verify-no-vendor-cycles.sh
-./hack/verify-test-featuregates.sh
 ./test/cmd/apply.sh
 ./test/cmd/apps.sh
 ./test/cmd/authorization.sh
diff --git a/hack/verify-openapi-spec.sh b/hack/verify-openapi-spec.sh
index 6965a6754ef..92d4ee883f2 100755
--- a/hack/verify-openapi-spec.sh
+++ b/hack/verify-openapi-spec.sh
@@ -32,7 +32,7 @@ _tmp="${KUBE_ROOT}/_tmp"
 
 mkdir -p "${_tmp}"
 cp -a "${SPECROOT}" "${TMP_SPECROOT}"
-trap 'cp -a "${TMP_SPECROOT}" "${SPECROOT}"/..; rm -rf "${_tmp}"' EXIT SIGINT
+trap 'cp -a ${TMP_SPECROOT} ${SPECROOT}/..; rm -rf ${_tmp}' EXIT SIGINT
 rm "${SPECROOT}"/*
 cp "${TMP_SPECROOT}/BUILD" "${SPECROOT}/BUILD"
 cp "${TMP_SPECROOT}/README.md" "${SPECROOT}/README.md"
diff --git a/hack/verify-test-featuregates.sh b/hack/verify-test-featuregates.sh
index e801cc53420..12175f0472f 100755
--- a/hack/verify-test-featuregates.sh
+++ b/hack/verify-test-featuregates.sh
@@ -18,7 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 source "${KUBE_ROOT}/hack/lib/init.sh"
 
 cd "${KUBE_ROOT}"
@@ -26,7 +26,7 @@ cd "${KUBE_ROOT}"
 rc=0
 
 # find test files accessing the mutable global feature gate or interface
-direct_sets=$(grep -n --include *_test.go -R 'MutableFeatureGate' . 2>/dev/null) || true
+direct_sets=$(grep -n --include './*_test.go' -R 'MutableFeatureGate' . 2>/dev/null) || true
 if [[ -n "${direct_sets}" ]]; then
   echo "Test files may not access mutable global feature gates directly:" >&2
   echo "${direct_sets}" >&2
@@ -38,7 +38,7 @@ if [[ -n "${direct_sets}" ]]; then
 fi
 
 # find test files calling SetFeatureGateDuringTest and not calling the result
-missing_defers=$(grep -n --include *_test.go -R 'SetFeatureGateDuringTest' . 2>/dev/null | egrep -v "defer .*\\)\\(\\)$") || true
+missing_defers=$(grep -n --include './*_test.go' -R 'SetFeatureGateDuringTest' . 2>/dev/null | grep -E -v "defer .*\\)\\(\\)$") || true
 if [[ -n "${missing_defers}" ]]; then
   echo "Invalid invocations of utilfeaturetesting.SetFeatureGateDuringTest():" >&2
   echo "${missing_defers}" >&2