diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 414a64e1a..5a53d485d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -107,3 +107,21 @@ jobs:
 
       - name: Run tests
         run: cd examples && go test ./...
+
+  ensure-docker:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Build image
+        run: |
+          docker build . \
+          --tag ghcr.io/$GITHUB_REPOSITORY:$GITHUB_SHA
+
+      - name: Check image
+        run: |
+          docker run \
+          -v ./_testdata/examples/petstore.yml:/petstore.yml \
+          --rm \
+          ghcr.io/$GITHUB_REPOSITORY:$GITHUB_SHA /petstore.yml
diff --git a/Dockerfile b/Dockerfile
index d5fba04a8..ab6017195 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,19 +1,16 @@
 ARG GO_VERSION=latest
 
-FROM golang:$GO_VERSION as builder
-
+FROM golang:$GO_VERSION AS builder
 WORKDIR /go/src/app
-
 COPY . .
-
 RUN go mod download
-
 RUN CGO_ENABLED=0 go build -o /go/bin/ogen ./cmd/ogen/main.go
 
 FROM scratch
-
+# We need go in resulting image to run goimports.
+COPY --from=builder /usr/local/go/ /usr/local/go/
+ENV PATH="/usr/local/go/bin:${PATH}"
+# Copy built binary.
 WORKDIR /
-
 COPY --from=builder /go/bin/ogen ./ogen
-
 ENTRYPOINT ["./ogen"]