diff --git a/src/completion.rs b/src/completion.rs
index 65187872c..5aad1619e 100644
--- a/src/completion.rs
+++ b/src/completion.rs
@@ -11,6 +11,11 @@ use crate::display::format_relative_time_short;
 use worktrunk::config::{ProjectConfig, WorktrunkConfig};
 use worktrunk::git::{BranchCategory, HookType, Repository};
 
+/// Deprecated args that should never appear in completions.
+/// These are hidden from help AND completions, unlike other hidden args
+/// that appear when completing `--`.
+const DEPRECATED_ARGS: &[&str] = &["--no-background"];
+
 /// Handle shell-initiated completion requests via `COMPLETE=$SHELL wt`
 pub fn maybe_handle_env_completion() -> bool {
     let Some(shell_name) = std::env::var_os("COMPLETE") else {
@@ -104,6 +109,15 @@ pub fn maybe_handle_env_completion() -> bool {
         completions
     };
 
+    // Filter out deprecated args - they should never appear in completions
+    let completions: Vec<_> = completions
+        .into_iter()
+        .filter(|c| {
+            let value = c.get_value().to_string_lossy();
+            !DEPRECATED_ARGS.contains(&value.as_ref())
+        })
+        .collect();
+
     // Write completions in the appropriate format for the shell
     let shell_name = shell_name.to_string_lossy();
     let ifs = std::env::var("_CLAP_IFS").ok();
diff --git a/tests/integration_tests/completion.rs b/tests/integration_tests/completion.rs
index 2c6795280..00ac719c0 100644
--- a/tests/integration_tests/completion.rs
+++ b/tests/integration_tests/completion.rs
@@ -1147,3 +1147,79 @@ fn test_complete_single_dash_shows_both_short_and_long_flags(repo: TestRepo) {
         );
     }
 }
+
+/// Deprecated args should never appear in completions.
+///
+/// Args like `--no-background` are deprecated and hidden from help. They should also
+/// be hidden from tab completion, even when completing `--` (which shows other hidden args).
+#[rstest]
+fn test_complete_excludes_deprecated_args(repo: TestRepo) {
+    repo.commit("initial");
+
+    // Deprecated args that should never appear
+    let deprecated = ["--no-background"];
+
+    for shell in ["bash", "zsh", "fish"] {
+        // Test: wt remove --<cursor> - should NOT show --no-background
+        let output = repo
+            .completion_cmd_for_shell(&["wt", "remove", "--"], shell)
+            .output()
+            .unwrap();
+        assert!(output.status.success(), "{shell}: completion failed");
+        let stdout = String::from_utf8_lossy(&output.stdout);
+
+        // Should have regular options
+        assert!(
+            stdout.contains("--foreground"),
+            "{shell}: should show --foreground, got:\n{stdout}"
+        );
+
+        // Should NOT have deprecated options
+        for arg in &deprecated {
+            assert!(
+                !stdout.contains(arg),
+                "{shell}: should NOT show deprecated {arg}, got:\n{stdout}"
+            );
+        }
+
+        // Test: wt hook post-start --<cursor> - same behavior
+        let output = repo
+            .completion_cmd_for_shell(&["wt", "hook", "post-start", "--"], shell)
+            .output()
+            .unwrap();
+        assert!(output.status.success(), "{shell}: completion failed");
+        let stdout = String::from_utf8_lossy(&output.stdout);
+
+        assert!(
+            stdout.contains("--foreground"),
+            "{shell}: hook post-start should show --foreground, got:\n{stdout}"
+        );
+
+        for arg in &deprecated {
+            assert!(
+                !stdout.contains(arg),
+                "{shell}: hook post-start should NOT show deprecated {arg}, got:\n{stdout}"
+            );
+        }
+
+        // Test: wt hook post-switch --<cursor> - same behavior
+        let output = repo
+            .completion_cmd_for_shell(&["wt", "hook", "post-switch", "--"], shell)
+            .output()
+            .unwrap();
+        assert!(output.status.success(), "{shell}: completion failed");
+        let stdout = String::from_utf8_lossy(&output.stdout);
+
+        assert!(
+            stdout.contains("--foreground"),
+            "{shell}: hook post-switch should show --foreground, got:\n{stdout}"
+        );
+
+        for arg in &deprecated {
+            assert!(
+                !stdout.contains(arg),
+                "{shell}: hook post-switch should NOT show deprecated {arg}, got:\n{stdout}"
+            );
+        }
+    }
+}