diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index dac4666..8e14948 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -9,11 +9,11 @@ jobs:
       fail-fast: false
       matrix:
         config:
-        - { os: macos-10.15, xcode: "12.0.1" } # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-10.15-Readme.md#xcode
-        - { os: macos-11.0, xcode: "11.7" }    # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11.0-Readme.md#xcode
+        - { os: macos-10.15 } # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-10.15-Readme.md#xcode
+        - { os: macos-11.0  } # https://github.com/actions/virtual-environments/blob/main/images/macos/macos-11.0-Readme.md#xcode
         build: [Debug, Release]
 
-    name: "xcode${{matrix.config.xcode}}:${{matrix.build}}"
+    name: "${{matrix.config.os}}:${{matrix.build}}"
     steps:
     - uses: actions/checkout@v2
 
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 6afe378..6ff99f5 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -10,11 +10,9 @@ jobs:
       matrix:
         build: [Debug, Release]
         compiler:
-        - { cc: "gcc-8", cxx: "g++-8" }
-        - { cc: "gcc-9", cxx: "g++-9" }
-        - { cc: "gcc-10", cxx: "g++-10" }
-        - { cc: "clang-8", cxx: "clang++-8" }
-        - { cc: "clang-9", cxx: "clang++-9" }
+        - { cc: "gcc-9",    cxx: "g++-9" }
+        - { cc: "gcc-10",   cxx: "g++-10" }
+        - { cc: "clang-9",  cxx: "clang++-9" }
         - { cc: "clang-10", cxx: "clang++-10" }
 
     name: "${{matrix.compiler.cxx}}:${{matrix.build}}"