test

src/install/install.zig

@@ -15018,7 +15018,7 @@ pub const PackageManager = struct {
 
             try manager.saveLockfile(&load_result, save_format, had_any_diffs, lockfile_before_install, packages_len_before_install, log_level);
 
-            if (manager.options.do.summary) {
+            if (manager.options.do.summary and log_level != .silent) {
                 // TODO(dylan-conway): packages aren't installed but we can still print
                 // added/removed/updated direct dependencies.
                 Output.pretty(

test/cli/install/bun-install-registry.test.ts

@@ -1970,6 +1970,25 @@ test("--lockfile-only", async () => {
   expect((await Bun.file(join(packageDir, "bun.lock")).text()).replaceAll(/localhost:\d+/g, "localhost:1234")).toBe(
     firstLockfile,
   );
+
+  // --silent works
+  const {
+    stdout,
+    stderr,
+    exited: exited2,
+  } = spawn({
+    cmd: [bunExe(), "install", "--lockfile-only", "--silent"],
+    cwd: packageDir,
+    stdout: "pipe",
+    stderr: "pipe",
+    env,
+  });
+
+  expect(await exited2).toBe(0);
+  const out = await Bun.readableStreamToText(stdout);
+  const err = await Bun.readableStreamToText(stderr);
+  expect(out).toBe("");
+  expect(err).toBe("");
 });
 
 describe("bundledDependencies", () => {