diff --git a/libs/ag-ui/tsconfig.type-tests.json b/libs/ag-ui/tsconfig.type-tests.json
index 47e1cd415..1bdf4776a 100644
--- a/libs/ag-ui/tsconfig.type-tests.json
+++ b/libs/ag-ui/tsconfig.type-tests.json
@@ -2,6 +2,12 @@
   "extends": "./tsconfig.lib.json",
   "compilerOptions": {
     "noEmit": true,
+    // This target runs the workspace `tsc` (newer than the build compilers),
+    // which errors on the inherited baseUrl unless deprecations are ignored.
+    "ignoreDeprecations": "6.0",
+    // Type-specs import sibling libraries through tsconfig paths; with noEmit
+    // the rootDir only has to be wide enough to contain them.
+    "rootDir": "../..",
     "strict": true,
     "strictFunctionTypes": true,
     "skipLibCheck": true,
diff --git a/libs/chat/tsconfig.type-tests.json b/libs/chat/tsconfig.type-tests.json
index 68ecd35d2..49ad5fe1d 100644
--- a/libs/chat/tsconfig.type-tests.json
+++ b/libs/chat/tsconfig.type-tests.json
@@ -3,6 +3,12 @@
   "compilerOptions": {
     "outDir": "../../dist/out-tsc/type-tests",
     "noEmit": true,
+    // This target runs the workspace `tsc` (newer than the build compilers),
+    // which errors on the inherited baseUrl unless deprecations are ignored.
+    "ignoreDeprecations": "6.0",
+    // Type-specs import sibling libraries through tsconfig paths; with noEmit
+    // the rootDir only has to be wide enough to contain them.
+    "rootDir": "../..",
     "composite": false,
     "declarationMap": false,
     "emitDeclarationOnly": false,
diff --git a/libs/langgraph/tsconfig.type-tests.json b/libs/langgraph/tsconfig.type-tests.json
index 47e1cd415..1bdf4776a 100644
--- a/libs/langgraph/tsconfig.type-tests.json
+++ b/libs/langgraph/tsconfig.type-tests.json
@@ -2,6 +2,12 @@
   "extends": "./tsconfig.lib.json",
   "compilerOptions": {
     "noEmit": true,
+    // This target runs the workspace `tsc` (newer than the build compilers),
+    // which errors on the inherited baseUrl unless deprecations are ignored.
+    "ignoreDeprecations": "6.0",
+    // Type-specs import sibling libraries through tsconfig paths; with noEmit
+    // the rootDir only has to be wide enough to contain them.
+    "rootDir": "../..",
     "strict": true,
     "strictFunctionTypes": true,
     "skipLibCheck": true,