diff --git a/curl/upload/upload.go b/curl/upload/upload.go
index bf3dcce3fcb51b847d6f97a643f185d0c9b69ed8..7931535f875a7bdc0dca717442d14ffa5c09258e 100644
--- a/curl/upload/upload.go
+++ b/curl/upload/upload.go
@@ -28,7 +28,7 @@ func (r *RunfileVar) Set(value string) error {
 	return nil
 }
 
-func upload(curl string, src string, dest string, retry uint64, retry_delay uint64) error {
+func upload(curl string, src string, output string, dest string, retry uint64, retry_delay uint64) error {
 	args := []string{
 		"--netrc",
 		"--location",
@@ -38,11 +38,24 @@ func upload(curl string, src string, dest string, retry uint64, retry_delay uint
 		"--upload-file", src,
 		"--url", dest,
 	}
+
+	if output != "" {
+		args = append(args, "--output", output)
+	}
+
 	cmd := exec.Command(curl, args...)
 
+	runfilesEnv, err := runfiles.Env()
+	if err != nil {
+		return err
+	}
+
+	cmd.Env = append(os.Environ(), runfilesEnv...)
+
 	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
 
-	err := cmd.Run()
+	err = cmd.Run()
 	if err != nil {
 		return err
 	}
@@ -79,6 +92,7 @@ func main() {
 	var retry_delay uint64
 	var src RunfileVar
 	var url string
+	var output string
 
 	flag.Var(&curl, "curl", "The path to the curl bin")
 	flag.Uint64Var(&retry, "retry", 0, "The number of times to retry the request")
@@ -86,6 +100,7 @@ func main() {
 
 	flag.Var(&src, "src", "Path to the source file")
 	flag.StringVar(&url, "url", "", "The URL to upload to")
+	flag.StringVar(&output, "output", "", "Output file to use")
 
 	args_file, err := runfiles.Rlocation("upload.args")
 	if err != nil {
@@ -98,8 +113,7 @@ func main() {
 	}
 
 	flag.Parse()
-
-	err = upload(curl.String(), src.String(), url, retry, retry_delay)
+	err = upload(curl.String(), src.String(), output, url, retry, retry_delay)
 	if err != nil {
 		log.Fatal(err)
 	}
diff --git a/e2e/mock/curl.sh b/e2e/mock/curl.sh
index 13572498ffe2e766d318c7b333e21d3cafa59d33..92734a17ca24a28f218aba044129f1172b7373aa 100755
--- a/e2e/mock/curl.sh
+++ b/e2e/mock/curl.sh
@@ -7,6 +7,7 @@ while test "${#}" -ne 0; do
     shift
     ;;
   "--upload-file")
+    # Check that the input files exist
     printf '%s\n' "${1}"
     shift
     if ! test -e "${1}"; then
diff --git a/e2e/upload/file/BUILD.bazel b/e2e/upload/file/BUILD.bazel
index d3e917f724142107663eee6ae7e0b43fd6476622..149088424d3c891673f0909127437d047a3fb2af 100644
--- a/e2e/upload/file/BUILD.bazel
+++ b/e2e/upload/file/BUILD.bazel
@@ -76,3 +76,21 @@ curl_upload_file(
     )
     for test in ["basic", "original_filename", "injection", "no_extension"]
 ]
+
+# Check that --output is forwarded on to curl binary.
+genrule(
+    name = "execute_with_output",
+    testonly = True,
+    outs = [
+        "upload_with_output.out",
+    ],
+    cmd = "./$(location :upload_basic) --output output_file.txt > $@",
+    tools = [":upload_basic"],
+)
+
+diff_file_test(
+    name = "test_output",
+    size = "small",
+    a = ":expected_with_output.txt",
+    b = ":upload_with_output.out"
+)
diff --git a/e2e/upload/file/expected_with_output.txt b/e2e/upload/file/expected_with_output.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f7cf45654a5f1313f7b5aa4f7b63926f7ed929fc
--- /dev/null
+++ b/e2e/upload/file/expected_with_output.txt
@@ -0,0 +1,13 @@
+--netrc
+--location
+--progress-bar
+--retry
+3
+--retry-delay
+1
+--upload-file
+input.txt
+--url
+https://test.case/directory/fixture.txt
+--output
+output_file.txt