diff --git a/crates/uv-cli/src/lib.rs b/crates/uv-cli/src/lib.rs
index 13af9ebe25d7..480acca82b89 100644
--- a/crates/uv-cli/src/lib.rs
+++ b/crates/uv-cli/src/lib.rs
@@ -2485,6 +2485,11 @@ pub struct PythonPinArgs {
 
     #[arg(long, overrides_with("no_resolved"), hide = true)]
     pub no_resolved: bool,
+
+    /// Avoid validating the Python pin against the workspace in the current directory or any parent
+    /// directory.
+    #[arg(long)]
+    pub no_workspace: bool,
 }
 
 #[derive(Args)]
diff --git a/crates/uv/src/commands/python/install.rs b/crates/uv/src/commands/python/install.rs
index 79d594bbeab0..12b0ac61df7d 100644
--- a/crates/uv/src/commands/python/install.rs
+++ b/crates/uv/src/commands/python/install.rs
@@ -8,7 +8,6 @@ use std::collections::BTreeSet;
 use std::fmt::Write;
 use std::path::PathBuf;
 use tracing::debug;
-use uv_cache::Cache;
 use uv_client::Connectivity;
 use uv_configuration::PreviewMode;
 use uv_fs::CWD;
@@ -31,8 +30,7 @@ pub(crate) async fn install(
     native_tls: bool,
     connectivity: Connectivity,
     preview: PreviewMode,
-    isolated: bool,
-    _cache: &Cache,
+    no_config: bool,
     printer: Printer,
 ) -> Result<ExitStatus> {
     if preview.is_disabled() {
@@ -47,12 +45,12 @@ pub(crate) async fn install(
 
     let targets = targets.into_iter().collect::<BTreeSet<_>>();
     let requests: Vec<_> = if targets.is_empty() {
-        // Read from the version file, unless `isolated` was requested
-        let version_file_requests = if isolated {
+        // Read from the version file, unless `--no-config` was requested
+        let version_file_requests = if no_config {
             if PathBuf::from(PYTHON_VERSION_FILENAME).exists() {
-                debug!("Ignoring `.python-version` file due to isolated mode");
+                debug!("Ignoring `.python-version` file due to `--no-config`");
             } else if PathBuf::from(PYTHON_VERSIONS_FILENAME).exists() {
-                debug!("Ignoring `.python-versions` file due to isolated mode");
+                debug!("Ignoring `.python-versions` file due to `--no-config`");
             }
             None
         } else {
diff --git a/crates/uv/src/commands/python/pin.rs b/crates/uv/src/commands/python/pin.rs
index 0038b42c0aa4..fb4336e70d9a 100644
--- a/crates/uv/src/commands/python/pin.rs
+++ b/crates/uv/src/commands/python/pin.rs
@@ -25,7 +25,7 @@ pub(crate) async fn pin(
     resolved: bool,
     python_preference: PythonPreference,
     preview: PreviewMode,
-    isolated: bool,
+    no_workspace: bool,
     cache: &Cache,
     printer: Printer,
 ) -> Result<ExitStatus> {
@@ -33,7 +33,7 @@ pub(crate) async fn pin(
         warn_user_once!("`uv python pin` is experimental and may change without warning");
     }
 
-    let virtual_project = if isolated {
+    let virtual_project = if no_workspace {
         None
     } else {
         match VirtualProject::discover(&CWD, &DiscoveryOptions::default()).await {
diff --git a/crates/uv/src/lib.rs b/crates/uv/src/lib.rs
index e1eff7477b8b..1bf03f713cca 100644
--- a/crates/uv/src/lib.rs
+++ b/crates/uv/src/lib.rs
@@ -773,17 +773,13 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
             let args = settings::PythonInstallSettings::resolve(args, filesystem);
             show_settings!(args);
 
-            // Initialize the cache.
-            let cache = cache.init()?;
-
             commands::python_install(
                 args.targets,
                 args.reinstall,
                 globals.native_tls,
                 globals.connectivity,
                 globals.preview,
-                globals.isolated,
-                &cache,
+                cli.no_config || globals.isolated,
                 printer,
             )
             .await
@@ -829,7 +825,7 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
                 args.resolved,
                 globals.python_preference,
                 globals.preview,
-                globals.isolated,
+                args.no_workspace || globals.isolated,
                 &cache,
                 printer,
             )
diff --git a/crates/uv/src/settings.rs b/crates/uv/src/settings.rs
index 5c7e5b59e658..117b6df85d0e 100644
--- a/crates/uv/src/settings.rs
+++ b/crates/uv/src/settings.rs
@@ -503,6 +503,7 @@ impl PythonFindSettings {
 pub(crate) struct PythonPinSettings {
     pub(crate) request: Option<String>,
     pub(crate) resolved: bool,
+    pub(crate) no_workspace: bool,
 }
 
 impl PythonPinSettings {
@@ -513,11 +514,13 @@ impl PythonPinSettings {
             request,
             no_resolved,
             resolved,
+            no_workspace,
         } = args;
 
         Self {
             request,
             resolved: flag(resolved, no_resolved).unwrap_or(false),
+            no_workspace,
         }
     }
 }