diff --git a/cli/lsp/config.rs b/cli/lsp/config.rs
index 3ffc9e657a..cac0637a05 100644
--- a/cli/lsp/config.rs
+++ b/cli/lsp/config.rs
@@ -41,6 +41,7 @@ use deno_runtime::deno_node::PackageJson;
 use indexmap::IndexSet;
 use lsp_types::ClientCapabilities;
 use std::collections::BTreeMap;
+use std::collections::BTreeSet;
 use std::collections::HashMap;
 use std::ops::Deref;
 use std::ops::DerefMut;
@@ -1190,6 +1191,7 @@ pub struct ConfigData {
   pub resolver: Arc<WorkspaceResolver>,
   pub sloppy_imports_resolver: Option<Arc<CliSloppyImportsResolver>>,
   pub import_map_from_settings: Option<ModuleSpecifier>,
+  pub unstable: BTreeSet<String>,
   watched_files: HashMap<ModuleSpecifier, ConfigWatchedFileType>,
 }
 
@@ -1587,9 +1589,16 @@ impl ConfigData {
           .join("\n")
       );
     }
+    let unstable = member_dir
+      .workspace
+      .unstable_features()
+      .iter()
+      .chain(settings.unstable.as_deref())
+      .cloned()
+      .collect::<BTreeSet<_>>();
     let unstable_sloppy_imports = std::env::var("DENO_UNSTABLE_SLOPPY_IMPORTS")
       .is_ok()
-      || member_dir.workspace.has_unstable("sloppy-imports");
+      || unstable.contains("sloppy-imports");
     let sloppy_imports_resolver = unstable_sloppy_imports.then(|| {
       Arc::new(CliSloppyImportsResolver::new(
         SloppyImportsCachedFs::new_without_stat_cache(Arc::new(
@@ -1630,6 +1639,7 @@ impl ConfigData {
       lockfile,
       npmrc,
       import_map_from_settings,
+      unstable,
       watched_files,
     }
   }
diff --git a/cli/lsp/language_server.rs b/cli/lsp/language_server.rs
index 33ae539f85..a592245ce7 100644
--- a/cli/lsp/language_server.rs
+++ b/cli/lsp/language_server.rs
@@ -1384,14 +1384,10 @@ impl Inner {
         .clone();
       fmt_options.use_tabs = Some(!params.options.insert_spaces);
       fmt_options.indent_width = Some(params.options.tab_size as u8);
-      let maybe_workspace = self
-        .config
-        .tree
-        .data_for_specifier(&specifier)
-        .map(|d| &d.member_dir.workspace);
+      let config_data = self.config.tree.data_for_specifier(&specifier);
       let unstable_options = UnstableFmtOptions {
-        component: maybe_workspace
-          .map(|w| w.has_unstable("fmt-component"))
+        component: config_data
+          .map(|d| d.unstable.contains("fmt-component"))
           .unwrap_or(false),
       };
       let document = document.clone();
diff --git a/cli/lsp/resolver.rs b/cli/lsp/resolver.rs
index c89273147a..00587f8f50 100644
--- a/cli/lsp/resolver.rs
+++ b/cli/lsp/resolver.rs
@@ -555,8 +555,8 @@ fn create_graph_resolver(
       workspace.to_maybe_jsx_import_source_config().ok().flatten()
     }),
     maybe_vendor_dir: config_data.and_then(|d| d.vendor_dir.as_ref()),
-    bare_node_builtins_enabled: workspace
-      .is_some_and(|workspace| workspace.has_unstable("bare-node-builtins")),
+    bare_node_builtins_enabled: config_data
+      .is_some_and(|d| d.unstable.contains("bare-node-builtins")),
     sloppy_imports_resolver: config_data
       .and_then(|d| d.sloppy_imports_resolver.clone()),
   }))
diff --git a/tests/integration/lsp_tests.rs b/tests/integration/lsp_tests.rs
index 79e6dc5c48..2376aebd90 100644
--- a/tests/integration/lsp_tests.rs
+++ b/tests/integration/lsp_tests.rs
@@ -15484,25 +15484,23 @@ fn lsp_sloppy_imports() {
 fn lsp_sloppy_imports_prefers_dts() {
   let context = TestContextBuilder::new().use_temp_cwd().build();
   let temp_dir = context.temp_dir();
-  let temp_dir = temp_dir.path();
-
-  temp_dir
-    .join("deno.json")
-    .write(r#"{ "unstable": ["sloppy-imports"] }"#);
-
-  let mut client: LspClient = context
-    .new_lsp_command()
-    .set_root_dir(temp_dir.clone())
-    .build();
-  client.initialize_default();
-
-  temp_dir.join("a.js").write("export const foo: number;");
-
-  let a_dts = source_file(temp_dir.join("a.d.ts"), "export const foo = 3;");
+  temp_dir.write("deno.json", json!({}).to_string());
+  temp_dir.write("a.js", "export const foo: number;");
+  let a_dts =
+    source_file(temp_dir.path().join("a.d.ts"), "export const foo = 3;");
   let file = source_file(
-    temp_dir.join("file.ts"),
+    temp_dir.path().join("file.ts"),
     "import { foo } from './a.js';\nconsole.log(foo);",
   );
+  let mut client: LspClient = context.new_lsp_command().build();
+  client.initialize_default();
+  client.change_configuration(json!({
+    "deno": {
+      "enable": true,
+      "unstable": ["sloppy-imports"],
+    },
+  }));
+
   let diagnostics = client.did_open_file(&file);
   // no other warnings because "a.js" exists
   assert_eq!(