diff --git a/.github/workflows/unittests.yaml b/.github/workflows/unittests.yaml
index eca5094..aeab07e 100644
--- a/.github/workflows/unittests.yaml
+++ b/.github/workflows/unittests.yaml
@@ -20,10 +20,18 @@ jobs:
         os:
           - 'ubuntu-latest'
 
-    name: nimble test ${{ matrix.os }} ${{ matrix.nim }}
+    name: Tests on ${{ matrix.os }}, nim ${{ matrix.nim }}
     steps:
       - uses: actions/checkout@v2
 
+      - name: Cache nimble
+        id: cache-nimble
+        uses: actions/cache@v1
+        with:
+          path: ~/.nimble
+          key: ${{ runner.os }}-nimble-${{ hashFiles('*.nimble') }}
+        if: runner.os != 'Windows'
+
       - name: Setup nim
         uses: jiro4989/setup-nim-action@v1
         with: