Revert "..."

This reverts commit 4d9f2ac2b9493583c1d7a58e1a5e2bd44c6194b7.

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
   rust-test:
     runs-on: ${{ matrix.os }}
 
-    continue-on-error: ${{ matrix.toolchain != stable }}
+    continue-on-error: ${{ matrix.continue-on-error }}
 
     strategy:
       matrix:
@@ -68,6 +68,18 @@ jobs:
               features: --all-features,
               continue-on-error: true,
             }
+          - {
+              os: macos-latest,
+              toolchain: stable,
+              features: --all-features,
+              continue-on-error: true,
+            }
+          - {
+              os: macos-latest,
+              toolchain: stable,
+              features: --no-default-features --features timestamps,
+              continue-on-error: true,
+            }
 
     steps:
       - uses: actions/checkout@v2