diff --git a/04_setup_ironic.sh b/04_setup_ironic.sh
index 5e56dad87..123ee95f7 100755
--- a/04_setup_ironic.sh
+++ b/04_setup_ironic.sh
@@ -62,6 +62,15 @@ for IMAGE_VAR in $(env | grep "_LOCAL_IMAGE=" | grep -o "^[^=]*") ; do
                 fi
             done
         fi
+
+        # If we set a specific PR number for the image, we can test it locally
+        IMAGE_PR_VAR=${IMAGE_VAR/_LOCAL_IMAGE}_PR
+        IMAGE_PR=${!IMAGE_PR_VAR:-}
+        if [[ -n ${IMAGE_PR:-} ]]; then
+                git fetch origin pull/${IMAGE_PR}/head:pr${IMAGE_PR}
+                git checkout pr${IMAGE_PR}
+        fi
+
         # If we built a custom base image, we should use it as a new base in
         # the Dockerfile to prevent discrepancies between locally built images.
         # Replace all FROM entries with the base-image.
diff --git a/config_example.sh b/config_example.sh
index a792dc4f4..0882201b6 100755
--- a/config_example.sh
+++ b/config_example.sh
@@ -33,6 +33,12 @@ set -x
 # .repo file, e.g. if the filename is ocp46.repo
 # export CUSTOM_REPO_FILE=ocp46.repo
 
+# If needed, we can fetch the change associated to a Pull Request for the images
+# we're building locally. Specifying the PR number will fetch the PR, switch the
+# local image repo to it, and build the image locally with that specific change.
+# For example, for the PR #34 for the ironic-image:
+# export IRONIC_PR=34
+
 # IP stack version.  The default is "v6".  You may also set "v4".
 # For dual stack (IPv4 + IPv6), use "v4v6".
 #export IP_STACK=v4