diff --git a/hack/prepare-irso-tests.sh b/hack/prepare-irso-tests.sh
index e7e078a73..7d424ac99 100755
--- a/hack/prepare-irso-tests.sh
+++ b/hack/prepare-irso-tests.sh
@@ -9,12 +9,35 @@ CLUSTER_TYPE="${CLUSTER_TYPE:-kind}"
 CONTAINER_RUNTIME="${CONTAINER_RUNTIME:-podman}"
 IRONIC_CUSTOM_IMAGE=${IRONIC_CUSTOM_IMAGE:-localhost/ironic:test}
 
-"${CONTAINER_RUNTIME}" build -t "${IRONIC_CUSTOM_IMAGE}" .
+declare -a build_args
+declare -a to_delete
+
+if [[ -n "${IRONIC_SOURCE:-}" ]]; then
+    if [[ -d "${IRONIC_SOURCE}" ]]; then
+        cp -ra "${IRONIC_SOURCE}" sources/ironic
+        rm -rf sources/ironic/.tox
+        to_delete+=(sources/ironic)
+    fi
+    build_args+=(--build-arg IRONIC_SOURCE=ironic)
+fi
+if [[ -n "${SUSHY_SOURCE:-}" ]]; then
+    if [[ -d "${SUSHY_SOURCE}" ]]; then
+        cp -ra "${SUSHY_SOURCE}" sources/sushy
+        rm -rf sources/sushy/.tox
+        to_delete+=(sources/sushy)
+    fi
+    build_args+=(--build-arg SUSHY_SOURCE=sushy)
+fi
+
+"${CONTAINER_RUNTIME}" build -t "${IRONIC_CUSTOM_IMAGE}" "${build_args[@]}" .
+
 IMAGE_ARCHIVE="$(mktemp --suffix=.tar)"
 "${CONTAINER_RUNTIME}" save "${IRONIC_CUSTOM_IMAGE}" > "${IMAGE_ARCHIVE}"
+to_delete+=("${IMAGE_ARCHIVE}")
+
 if [[ "${CLUSTER_TYPE}" == "kind" ]]; then
     kind load image-archive -v 2 "${IMAGE_ARCHIVE}"
 else
     minikube image load --logtostderr "${IMAGE_ARCHIVE}"
 fi
-rm -f "${IMAGE_ARCHIVE}"
+rm -rf "${to_delete[@]}"