diff --git a/.github/workflows/evals-nightly.yml b/.github/workflows/evals-nightly.yml
index 76e4da22a3..c64d59ec77 100644
--- a/.github/workflows/evals-nightly.yml
+++ b/.github/workflows/evals-nightly.yml
@@ -9,6 +9,10 @@ on:
         description: 'Run all evaluations (including usually passing)'
         type: 'boolean'
         default: true
+      test_filter:
+        description: 'Regex to filter tests (passed to vitest -t)'
+        type: 'string'
+        required: false
 
 permissions:
   contents: 'read'
@@ -53,7 +57,12 @@ jobs:
           GEMINI_API_KEY: '${{ secrets.GEMINI_API_KEY }}'
           GEMINI_MODEL: '${{ matrix.model }}'
           RUN_EVALS: "${{ github.event.inputs.run_all != 'false' }}"
-        run: 'npm run test:all_evals'
+        run: |
+          if [ -n "${{ inputs.test_filter }}" ]; then
+            npm run test:all_evals -- -t "${{ inputs.test_filter }}"
+          else
+            npm run test:all_evals
+          fi
 
       - name: 'Upload Logs'
         if: 'always()'
diff --git a/package.json b/package.json
index 08c7a7ccd6..fe191fe813 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "test:ci": "npm run test:ci --workspaces --if-present && npm run test:scripts",
     "test:scripts": "vitest run --config ./scripts/tests/vitest.config.ts",
     "test:always_passing_evals": "vitest run --config evals/vitest.config.ts",
+    "test:eval": "cross-env RUN_EVALS=1 vitest run --config evals/vitest.config.ts",
     "test:all_evals": "cross-env RUN_EVALS=1 vitest run --config evals/vitest.config.ts",
     "test:e2e": "cross-env VERBOSE=true KEEP_OUTPUT=true npm run test:integration:sandbox:none",
     "test:integration:all": "npm run test:integration:sandbox:none && npm run test:integration:sandbox:docker && npm run test:integration:sandbox:podman",