diff --git a/spec/metrics_spec.rb b/spec/metrics_spec.rb
index 1ae88943..1312c461 100644
--- a/spec/metrics_spec.rb
+++ b/spec/metrics_spec.rb
@@ -52,6 +52,10 @@
       Pliny::Metrics.backends = [test_backend]
     end
 
+    after do
+      Timecop.return
+    end
+
     it "measures a block's execution time with a single key" do
       metrics.measure(:foo) { }
       expect(test_backend).to have_received(:report_measures).once.with(
diff --git a/spec/middleware/metrics_spec.rb b/spec/middleware/metrics_spec.rb
index f4ed5e81..71150555 100644
--- a/spec/middleware/metrics_spec.rb
+++ b/spec/middleware/metrics_spec.rb
@@ -26,6 +26,10 @@ def app
     allow(Pliny::Metrics).to receive(:measure)
   end
 
+  after do
+    Timecop.return
+  end
+
   it "counts total requests" do
     expect(Pliny::Metrics).to receive(:count).with("requests").once