diff --git a/.github/workflows/runtests.yml b/.github/workflows/runtests.yml
index 1a023db..f6a4ddd 100644
--- a/.github/workflows/runtests.yml
+++ b/.github/workflows/runtests.yml
@@ -18,11 +18,16 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+
       - uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
           arch: ${{ matrix.julia-arch }}
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
-        # with:
-        #   annotate: true
+
+      - uses: julia-actions/julia-processcoverage@v1
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/test/Schedulers.jl b/test/Schedulers.jl
index 1b3dd16..d6ed877 100644
--- a/test/Schedulers.jl
+++ b/test/Schedulers.jl
@@ -32,7 +32,7 @@ using Test
   @testset "check `add_noise` terminal SNR" begin
     T = 10
     batch_size = 1
-    size = 1000
+    size = 2500
 
     # create a DDPM with a terminal SNR cosine beta schedule
     ddpm = Diffusers.DDPM(