diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 26c67c2..f5af7ca 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,7 +3,7 @@ name: Test
 on:
   push:
     branches:
-      - 'main'
+      - "main"
     paths-ignore:
       - "**.md"
   pull_request:
@@ -28,8 +28,63 @@ jobs:
           git commit -m "first commit"
           git remote add origin https://github.com/Test/release-plz-test.git
       - name: Run release-plz
+        id: release-plz
         uses: ./ # Uses an action in the root directory
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           project_manifest: .github/workflows/marco-test-one/Cargo.toml
+      - name: Assert release
+        env:
+          RELEASES: ${{ steps.release-plz.outputs.releases }}
+          PRS: ${{ steps.release-plz.outputs.prs }}
+          PR: ${{ steps.release-plz.outputs.pr }}
+          PRS_CREATED: ${{ steps.release-plz.outputs.prs_created }}
+          RELEASES_CREATED: ${{ steps.release-plz.outputs.releases_created }}
+        run: |
+          set -e
+          echo "releases: $RELEASES"
+          echo "prs: $PRS"
+          echo "pr: $PR"
+          echo "prs_created: $PRS_CREATED"
+          echo "releases_created: $RELEASES_CREATED"
+
+          releases_length=$(echo "$RELEASES" | jq 'length')
+          echo "releases_length: $releases_length"
+          if [ "$releases_length" != "1" ]; then
+            echo "too many releases"
+            exit 1
+          fi
+
+          release_version=$(echo "$RELEASES" | jq -r '.[0].version')
+          echo "release_version: $release_version"
+          if [ "$release_version" != "0.1.0" ]; then
+            echo "bad version"
+            exit 1
+          fi
+          echo ${{ fromJSON(steps.release-plz.outputs.releases) }}
+          if [ "$release_version" != ${{ fromJSON(steps.release-plz.outputs.releases)[0].version }} ]; then
+            echo "bad version (fromJSON)"
+            exit 1
+          fi
+
+          release_tag=$(echo "$RELEASES" | jq -r '.[0].tag')
+          echo "release_tag: $release_tag"
+          if [ "$release_tag" != "v0.1.0" ]; then
+            echo "bad tag"
+            exit 1
+          fi
+
+          release_package_name=$(echo "$RELEASES" | jq -r '.[0].package_name')
+          echo "release_package_name: $release_package_name"
+          if [ "$release_package_name" != "marco-test-one" ]; then
+            echo "bad package name"
+            exit 1
+          fi
+
+          prs_length=$(echo "$PRS" | jq 'length')
+          echo "prs_length: $prs_length"
+          if [ "$prs_length" != "0" ]; then
+            echo "too many prs"
+            exit 1
+          fi
diff --git a/action.yml b/action.yml
index 3eba247..9a9769a 100644
--- a/action.yml
+++ b/action.yml
@@ -22,6 +22,24 @@ inputs:
     description: "Release-plz version to use. It must be an existing git tag name. For example `release-plz-v0.2.45`. (Default: `latest`)."
     default: "release-plz-v0.3.63"
     required: false
+outputs:
+  # Useful for when https://github.com/MarcoIeni/release-plz/issues/1029 is implemented.
+  # For now, it just returns an array with `pr` in it.
+  prs:
+    description: "The release PRs opened by release-plz. (Not useful for now. Use `pr` instead)"
+    value: ${{ steps.release-plz.outputs.prs }}
+  pr:
+    description: "The release PR opened by release-plz."
+    value: ${{ steps.release-plz.outputs.pr }}
+  releases:
+    description: "The JSON output of the `release` command."
+    value: ${{ steps.release-plz.outputs.releases }}
+  prs_created:
+    description: "Whether release-plz created any release PR."
+    value: ${{ steps.release-plz.outputs.prs_created }}
+  releases_created:
+    description: "Whether release-plz released any package."
+    value: ${{ steps.release-plz.outputs.releases_created }}
 branding:
   icon: "zap"
   color: "yellow"
@@ -43,6 +61,7 @@ runs:
     - name: Configure git user from GitHub token
       uses: MarcoIeni/git-config@v0.1
     - name: Run release-plz
+      id: release-plz
       shell: bash
       run: |
         if [[ -n "${{ inputs.config }}" ]]
@@ -75,20 +94,45 @@ runs:
         if [[ -z "${{ inputs.command }}" || "${{ inputs.command }}" == "release-pr" ]]
         then
             echo "-- Running release-plz release-pr --"
-            release-plz release-pr\
+            release_pr_output=$(release-plz release-pr\
                 --git-token ${GITHUB_TOKEN}\
                 --repo-url https://github.com/${GITHUB_REPOSITORY}\
                 ${CONFIG_PATH}\
                 ${ALT_REGISTRY}\
-                ${MANIFEST_PATH}
+                ${MANIFEST_PATH}\
+                -o json)
+            echo "release_pr_output: $release_pr_output"
+            prs=$(echo $release_pr_output | jq -c .prs)
+            echo "prs=$prs" >> "$GITHUB_OUTPUT"
+            prs_length=$(echo "$prs" | jq 'length')
+            if [ "$prs_length" != "0" ]; then
+                prs_created=true
+                first_pr=$(echo $prs | jq -c .[0])
+            else
+                prs_created=false
+                first_pr="{}"
+            fi
+            echo "pr=$first_pr" >> "$GITHUB_OUTPUT"
+            echo "prs_created=$prs_created" >> "$GITHUB_OUTPUT"
         fi
 
         if [[ -z "${{ inputs.command }}" || "${{ inputs.command }}" == "release" ]]
         then
             echo "-- Running release-plz release --"
-            release-plz release\
+            release_output=$(release-plz release\
                 --git-token ${GITHUB_TOKEN}\
                 ${CONFIG_PATH}\
                 ${ALT_REGISTRY}\
-                ${MANIFEST_PATH}
+                ${MANIFEST_PATH}\
+                -o json)
+            echo "release_output: $release_output"
+            releases=$(echo $release_output | jq -c .releases)
+            echo "releases=$releases" >> "$GITHUB_OUTPUT"
+            releases_length=$(echo "$releases" | jq 'length')
+            if [ "$releases_length" != "0" ]; then
+                releases_created=true
+            else
+                releases_created=false
+            fi
+            echo "releases_created=$releases_created" >> "$GITHUB_OUTPUT"
         fi