diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index acb744a1..55a7191a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,32 +16,46 @@ jobs:
         include:
           - elixir: 1.12.x
             otp: 22.x
+            tests_may_fail: true
           - elixir: 1.12.x
             otp: 23.x
+            tests_may_fail: true
           - elixir: 1.12.x
             otp: 24.x
+            tests_may_fail: true
           - elixir: 1.13.x
             otp: 22.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 23.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 23.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 26.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 26.x
+            tests_may_fail: false
     env:
       MIX_ENV: test
     steps:
@@ -55,7 +69,7 @@ jobs:
           mix local.hex --force
           mix local.rebar --force
           mix deps.get --only test
-      - run: mix test
+      - run: mix test || ${{ matrix.tests_may_fail }}
 
   mix_test_windows:
     name: mix test windows (Elixir ${{matrix.elixir}} | Erlang/OTP ${{matrix.otp}})
@@ -66,32 +80,46 @@ jobs:
         include:
           - elixir: 1.12.x
             otp: 22.x
+            tests_may_fail: true
           - elixir: 1.12.x
             otp: 23.x
+            tests_may_fail: true
           - elixir: 1.12.x
             otp: 24.x
+            tests_may_fail: true
           - elixir: 1.13.x
             otp: 22.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 23.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.13.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 23.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.14.x
             otp: 26.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 24.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 25.x
+            tests_may_fail: false
           - elixir: 1.15.x
             otp: 26.x
+            tests_may_fail: false
     env:
       MIX_ENV: test
     steps:
@@ -108,7 +136,7 @@ jobs:
           mix local.hex --force
           mix local.rebar --force
           mix deps.get --only test
-      - run: mix test
+      - run: mix test || ${{ matrix.tests_may_fail }}
 
   static_analysis:
     name: static analysis (Elixir ${{matrix.elixir}} | Erlang/OTP ${{matrix.otp}})