diff --git a/.github/workflows/mix_test.yml b/.github/workflows/mix_test.yml
index 2c02365..e457c13 100644
--- a/.github/workflows/mix_test.yml
+++ b/.github/workflows/mix_test.yml
@@ -15,45 +15,13 @@ on:
 jobs:
   # Refactoring duplicated yaml is currently not possible
   # because Github does not support anchor syntax (& and *) now.
-  elixir_1_11:
-    runs-on: ubuntu-latest
-    name: Test on Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
-    strategy:
-      matrix:
-        elixir: [1.11.0]
-        otp: [21.0, 22.0, 23.0]
-    steps:
-      - uses: actions/checkout@v2
-      - uses: erlef/setup-beam@v1
-        with:
-          elixir-version: ${{matrix.elixir}}
-          otp-version: ${{matrix.otp}}
-      - run: mix deps.get
-      - run: mix test
-
-  elixir_1_10:
-    runs-on: ubuntu-latest
-    name: Test on Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
-    strategy:
-      matrix:
-        elixir: [1.10.0]
-        otp: [21.0, 22.0]
-    steps:
-      - uses: actions/checkout@v2
-      - uses: erlef/setup-beam@v1
-        with:
-          elixir-version: ${{matrix.elixir}}
-          otp-version: ${{matrix.otp}}
-      - run: mix deps.get
-      - run: mix test
-
-  elixir_1_9:
+  elixir_1_12:
     runs-on: ubuntu-latest
     name: Test on Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
     strategy:
       matrix:
-        elixir: [1.9.0]
-        otp: [20.0, 21.0, 22.0]
+        elixir: [1.12.0]
+        otp: [22.0, 23.0, 24.0]
     steps:
       - uses: actions/checkout@v2
       - uses: erlef/setup-beam@v1
@@ -63,13 +31,13 @@ jobs:
       - run: mix deps.get
       - run: mix test
 
-  elixir_1_8:
+  elixir_1_11:
     runs-on: ubuntu-latest
     name: Test on Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
     strategy:
       matrix:
-        elixir: [1.8.0]
-        otp: [20.0, 21.0, 22.0]
+        elixir: [1.11.0]
+        otp: [21.0, 22.0, 23.0]
     steps:
       - uses: actions/checkout@v2
       - uses: erlef/setup-beam@v1
@@ -79,13 +47,13 @@ jobs:
       - run: mix deps.get
       - run: mix test
 
-  elixir_1_7:
+  elixir_1_10:
     runs-on: ubuntu-latest
     name: Test on Elixir ${{matrix.elixir}} / OTP ${{matrix.otp}}
     strategy:
       matrix:
-        elixir: [1.7.0]
-        otp: [19.0, 20.0, 21.0, 22.0]
+        elixir: [1.10.0]
+        otp: [21.0, 22.0]
     steps:
       - uses: actions/checkout@v2
       - uses: erlef/setup-beam@v1