diff --git a/.gitea/workflows/ci.yaml b/.gitea/workflows/ci.yaml
index 3a83685..c362c0f 100644
--- a/.gitea/workflows/ci.yaml
+++ b/.gitea/workflows/ci.yaml
@@ -51,7 +51,7 @@ jobs:
       - name: Build test image.
         run: |
           docker build \
-            -file Dockerfile.test \
+            --file Dockerfile.test \
             --tag ${{ steps.meta.outputs.REPO_NAME }}:test \
             ${{ gitea.workspace }}