make `--check` outdated a non-error status 1 (#14167)

In the case of `uv sync` all we really need to do is handle the
`OutdatedEnvironment` error (precisely the error we yield only on
dry-runs when everything Works but we determine things are outdated) in
`OperationDiagnostic::report` (the post-processor on all
`operations::install` calls) because any diagnostic handled by that gets
downgraded to from status 2 to status 1 (although I don't know if that's
really intentional or a random other bug in our status handling... but I
figured it's best to highlight that other potential status code
incongruence than not rely on it 😄).

Fixes #12603

---------

Co-authored-by: John Mumm <jtfmumm@gmail.com>

crates/uv/src/commands/diagnostics.rs

@@ -127,6 +127,10 @@ impl OperationDiagnostic {
                 native_tls_hint(err);
                 None
             }
+            pip::operations::Error::OutdatedEnvironment => {
+                anstream::eprint!("{}", err);
+                None
+            }
             err => Some(err),
         }
     }

crates/uv/src/commands/project/lock.rs

@@ -234,6 +234,10 @@ pub(crate) async fn lock(
 
             Ok(ExitStatus::Success)
         }
+        Err(err @ ProjectError::LockMismatch(..)) => {
+            writeln!(printer.stderr(), "{}", err.to_string().bold())?;
+            Ok(ExitStatus::Failure)
+        }
         Err(ProjectError::Operation(err)) => {
             diagnostics::OperationDiagnostic::native_tls(network_settings.native_tls)
                 .report(err)
@@ -346,8 +350,11 @@ impl<'env> LockOperation<'env> {
                 .await?;
 
                 // If the lockfile changed, return an error.
-                if matches!(result, LockResult::Changed(_, _)) {
+                if let LockResult::Changed(prev, cur) = result {
-                    return Err(ProjectError::LockMismatch(Box::new(result.into_lock())));
+                    return Err(ProjectError::LockMismatch(
+                        prev.map(Box::new),
+                        Box::new(cur),
+                    ));
                 }
 
                 Ok(result)

crates/uv/src/commands/project/mod.rs

@@ -75,7 +75,7 @@ pub(crate) enum ProjectError {
     #[error(
         "The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`."
     )]
-    LockMismatch(Box<Lock>),
+    LockMismatch(Option<Box<Lock>>, Box<Lock>),
 
     #[error(
         "Unable to find lockfile at `uv.lock`. To create a lockfile, run `uv lock` or `uv sync`."

crates/uv/src/commands/project/sync.rs

@@ -330,10 +330,19 @@ pub(crate) async fn sync(
                 .report(err)
                 .map_or(Ok(ExitStatus::Failure), |err| Err(err.into()));
         }
-        Err(ProjectError::LockMismatch(lock)) if dry_run.enabled() => {
+        Err(ProjectError::LockMismatch(prev, cur)) => {
-            // The lockfile is mismatched, but we're in dry-run mode. We should proceed with the
+            if dry_run.enabled() {
-            // sync operation, but exit with a non-zero status.
+                // The lockfile is mismatched, but we're in dry-run mode. We should proceed with the
-            Outcome::LockMismatch(lock)
+                // sync operation, but exit with a non-zero status.
+                Outcome::LockMismatch(prev, cur)
+            } else {
+                writeln!(
+                    printer.stderr(),
+                    "{}",
+                    ProjectError::LockMismatch(prev, cur).to_string().bold()
+                )?;
+                return Ok(ExitStatus::Failure);
+            }
         }
         Err(err) => return Err(err.into()),
     };
@@ -398,7 +407,14 @@ pub(crate) async fn sync(
 
     match outcome {
         Outcome::Success(..) => Ok(ExitStatus::Success),
-        Outcome::LockMismatch(lock) => Err(ProjectError::LockMismatch(lock).into()),
+        Outcome::LockMismatch(prev, cur) => {
+            writeln!(
+                printer.stderr(),
+                "{}",
+                ProjectError::LockMismatch(prev, cur).to_string().bold()
+            )?;
+            Ok(ExitStatus::Failure)
+        }
     }
 }
 
@@ -409,15 +425,18 @@ enum Outcome {
     /// The `lock` operation was successful.
     Success(LockResult),
     /// The `lock` operation successfully resolved, but failed due to a mismatch (e.g., with `--locked`).
-    LockMismatch(Box<Lock>),
+    LockMismatch(Option<Box<Lock>>, Box<Lock>),
 }
 
 impl Outcome {
     /// Return the [`Lock`] associated with this outcome.
     fn lock(&self) -> &Lock {
         match self {
-            Self::Success(lock) => lock.lock(),
+            Self::Success(lock) => match lock {
-            Self::LockMismatch(lock) => lock,
+                LockResult::Changed(_, lock) => lock,
+                LockResult::Unchanged(lock) => lock,
+            },
+            Self::LockMismatch(_prev, cur) => cur,
         }
     }
 }
@@ -1179,7 +1198,7 @@ impl From<(&LockTarget<'_>, &LockMode<'_>, &Outcome)> for LockReport {
                     }
                 }
                 // TODO(zanieb): We don't have a way to report the outcome of the lock yet
-                Outcome::LockMismatch(_) => LockAction::Check,
+                Outcome::LockMismatch(..) => LockAction::Check,
             },
             dry_run: matches!(mode, LockMode::DryRun(_)),
         }

crates/uv/tests/it/lock.rs

@@ -6660,15 +6660,15 @@ fn lock_invalid_hash() -> Result<()> {
         "#)?;
 
     // Re-run with `--locked`.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Install from the lockfile.
     uv_snapshot!(context.filters(), context.sync().arg("--frozen"), @r###"
@@ -11743,6 +11743,95 @@ fn unconditional_overlapping_marker_disjoint_version_constraints() -> Result<()>
     Ok(())
 }
 
+/// Checks the output of `uv lock --check` when there isn't a lock
+#[test]
+fn check_no_lock() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "myproject"
+        version = "0.1.0"
+        requires-python = ">=3.11"
+        dependencies = ["sortedcollections"]
+        "#,
+    )?;
+
+    uv_snapshot!(context.filters(), context.lock()
+        .arg("--check"), @r"
+    success: false
+    exit_code: 2
+    ----- stdout -----
+
+    ----- stderr -----
+    error: Unable to find lockfile at `uv.lock`. To create a lockfile, run `uv lock` or `uv sync`.
+    ");
+    Ok(())
+}
+
+/// Checks the output of `uv lock --check` when the lock is outdated
+#[test]
+fn check_outdated_lock() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "myproject"
+        version = "0.1.0"
+        requires-python = ">=3.11"
+        dependencies = ["sortedcollections"]
+        "#,
+    )?;
+
+    // Generate the lock
+    uv_snapshot!(context.filters(), context.lock(), @r"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    ");
+
+    // Check the --check returns fine
+    uv_snapshot!(context.filters(), context.lock()
+        .arg("--check"), @r"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 3 packages in [TIME]
+    ");
+
+    // Edit dependencies so the lock is invalid
+    pyproject_toml.write_str(
+        r#"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.11"
+        dependencies = ["iniconfig"]
+        "#,
+    )?;
+
+    uv_snapshot!(context.filters(), context.lock()
+        .arg("--check"), @r"
+    success: false
+    exit_code: 1
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 2 packages in [TIME]
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    ");
+    Ok(())
+}
+
 /// This checks that markers that normalize to 'false', which are serialized
 /// to the lockfile as `python_full_version < '0'`, get read back as false.
 /// Otherwise `uv lock --check` will always fail.
@@ -12094,15 +12183,15 @@ fn lock_remove_member() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 1 package in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run without `--locked`.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -12239,15 +12328,15 @@ fn lock_add_member() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 5 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run with `--offline`. This should also fail, during the resolve phase.
     uv_snapshot!(context.filters(), context.lock().arg("--locked").arg("--offline").arg("--no-cache"), @r###"
@@ -12476,15 +12565,15 @@ fn lock_redundant_add_member() -> Result<()> {
 
     // Re-run with `--locked`. This will fail, though in theory it could succeed, since the current
     // _resolution_ satisfies the requirements, even if the inputs are not identical
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run without `--locked`.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -12674,15 +12763,15 @@ fn lock_new_constraints() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run without `--locked`.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -12883,16 +12972,16 @@ fn lock_remove_member_non_project() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     warning: No `requires-python` value found in the workspace. Defaulting to `>=3.12`.
     Resolved in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run without `--locked`.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -13015,15 +13104,15 @@ fn lock_rename_project() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-run without `--locked`.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -14015,15 +14104,15 @@ fn lock_constrained_environment() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. This should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 8 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -15278,15 +15367,15 @@ fn lock_add_empty_dependency_group() -> Result<()> {
     )?;
 
     // Re-run with `--locked`; this should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-lock the project.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -15360,15 +15449,15 @@ fn lock_add_empty_dependency_group() -> Result<()> {
     )?;
 
     // Re-run with `--locked`; this should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     // Re-lock the project.
     uv_snapshot!(context.filters(), context.lock(), @r###"
@@ -23253,15 +23342,15 @@ fn lock_dynamic_to_static() -> Result<()> {
     )?;
 
     // Rerunning with `--locked` should fail, since the project is no longer dynamic.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 1 package in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -23384,15 +23473,15 @@ fn lock_static_to_dynamic() -> Result<()> {
         .write_str("__version__ = '0.1.0'")?;
 
     // Rerunning with `--locked` should fail, since the project is no longer static.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 1 package in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -23486,15 +23575,15 @@ fn lock_bump_static_version() -> Result<()> {
     )?;
 
     // Rerunning with `--locked` should fail.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 1 package in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -25302,15 +25391,15 @@ fn lock_script() -> Result<()> {
     })?;
 
     // Re-run with `--locked`.
-    uv_snapshot!(context.filters(), context.lock().arg("--script").arg("script.py").arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--script").arg("script.py").arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     Ok(())
 }
@@ -27631,15 +27720,15 @@ fn lock_empty_extra() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. We expect this to fail, since we've added an extra.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 3 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -27667,15 +27756,15 @@ fn lock_empty_extra() -> Result<()> {
     )?;
 
     // Re-run with `--locked`. We expect this to fail, since we've added an extra.
-    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r###"
+    uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 3 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
-    "###);
+    ");
 
     uv_snapshot!(context.filters(), context.lock(), @r###"
     success: true
@@ -28341,12 +28430,12 @@ fn lock_trailing_slash_index_url_in_pyproject_not_index_argument() -> Result<()>
     // Re-run with `--locked`.
     uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     Ok(())
@@ -28432,12 +28521,12 @@ fn lock_trailing_slash_index_url_in_lockfile_not_pyproject() -> Result<()> {
     // Run `uv lock --locked`.
     uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     Ok(())
@@ -28523,12 +28612,12 @@ fn lock_trailing_slash_index_url_in_pyproject_and_not_lockfile() -> Result<()> {
     // Run `uv lock --locked`.
     uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     Ok(())
@@ -28714,12 +28803,12 @@ fn lock_trailing_slash_find_links() -> Result<()> {
     // Re-run with `--locked`
     uv_snapshot!(context.filters(), context.lock().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     uv_snapshot!(context.filters(), context.lock(), @r"

crates/uv/tests/it/sync.rs

@@ -88,12 +88,12 @@ fn locked() -> Result<()> {
     // Running with `--locked` should error.
     uv_snapshot!(context.filters(), context.sync().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     let updated = context.read("uv.lock");
@@ -424,12 +424,12 @@ fn sync_json() -> Result<()> {
         .arg("--locked")
         .arg("--output-format").arg("json"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     Ok(())
@@ -894,7 +894,7 @@ fn check() -> Result<()> {
     // Running `uv sync --check` should fail.
     uv_snapshot!(context.filters(), context.sync().arg("--check"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
@@ -904,7 +904,7 @@ fn check() -> Result<()> {
     Would download 1 package
     Would install 1 package
      + iniconfig==2.0.0
-    error: The environment is outdated; run `uv sync` to update the environment
+    The environment is outdated; run `uv sync` to update the environment
     ");
 
     // Sync the environment.
@@ -8626,7 +8626,7 @@ fn sync_dry_run_and_locked() -> Result<()> {
     // Running with `--locked` and `--dry-run` should error.
     uv_snapshot!(context.filters(), context.sync().arg("--locked").arg("--dry-run"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
@@ -8635,7 +8635,7 @@ fn sync_dry_run_and_locked() -> Result<()> {
     Would download 1 package
     Would install 1 package
      + iniconfig==2.0.0
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     let updated = context.read("uv.lock");
@@ -8962,13 +8962,13 @@ fn sync_locked_script() -> Result<()> {
     // Re-run with `--locked`.
     uv_snapshot!(&filters, context.sync().arg("--script").arg("script.py").arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Using script environment at: [CACHE_DIR]/environments-v2/script-[HASH]
     Resolved 4 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     uv_snapshot!(&filters, context.sync().arg("--script").arg("script.py"), @r"
@@ -9064,14 +9064,14 @@ fn sync_locked_script() -> Result<()> {
     // Re-run with `--locked`.
     uv_snapshot!(&filters, context.sync().arg("--script").arg("script.py").arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Updating script environment at: [CACHE_DIR]/environments-v2/script-[HASH]
     warning: Ignoring existing lockfile due to fork markers being disjoint with `requires-python`: `python_full_version >= '3.11'` vs `python_full_version >= '3.8' and python_full_version < '3.11'`
     Resolved 6 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     uv_snapshot!(&filters, context.sync().arg("--script").arg("script.py"), @r"
@@ -9944,12 +9944,12 @@ fn sync_build_constraints() -> Result<()> {
     // This should fail, given that the build constraints have changed.
     uv_snapshot!(context.filters(), context.sync().arg("--locked"), @r"
     success: false
-    exit_code: 2
+    exit_code: 1
     ----- stdout -----
 
     ----- stderr -----
     Resolved 2 packages in [TIME]
-    error: The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
+    The lockfile at `uv.lock` needs to be updated, but `--locked` was provided. To update the lockfile, run `uv lock`.
     ");
 
     // Changing the build constraints should lead to a re-resolve.