diff --git a/app/models/git_repository.rb b/app/models/git_repository.rb
index dfd8c96ea9..b8a3377669 100644
--- a/app/models/git_repository.rb
+++ b/app/models/git_repository.rb
@@ -93,7 +93,7 @@ def update_mirror
 
   # clear worktrees that are deleted
   def prune_worktree
-    executor.execute("cd #{repo_cache_dir}", "git worktree prune")
+    capture_stdout "git", "worktree", "prune", dir: repo_cache_dir
   end
 
   private
diff --git a/test/models/git_repository_test.rb b/test/models/git_repository_test.rb
index 6b96c333c6..f68046566e 100644
--- a/test/models/git_repository_test.rb
+++ b/test/models/git_repository_test.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 require_relative '../test_helper'
 
-SingleCov.covered! uncovered: 7
+SingleCov.covered! uncovered: 6
 
 describe GitRepository do
   include GitRepoTestHelper
@@ -353,4 +353,16 @@ def call
       call.must_equal callsite
     end
   end
+
+  describe "#prune_worktree" do
+    it "silently prunes" do
+      create_repo_without_tags
+      Dir.mktmpdir do |dir|
+        repository.checkout_workspace dir, 'master'
+      end
+      repository.prune_worktree
+      `cd #{repository.repo_cache_dir} && git worktree list`.split("\n").size.must_equal 1
+      repository.executor.output.string.wont_include "prune"
+    end
+  end
 end