diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 887f6c034..756d75205 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,16 +16,19 @@ jobs:
       matrix:
         include:
           - pair:
-              elixir: 1.10.4
-              otp: 21.3.8.21
+              elixir: "1.10"
+              otp: 21
           - pair:
-              elixir: 1.11.4
-              otp: 23.3.3
+              elixir: "1.11"
+              otp: 23
+          - pair:
+              elixir: "1.12"
+              otp: 24
             lint: lint
     steps:
       - uses: actions/checkout@v2
 
-      - uses: erlef/setup-elixir@v1
+      - uses: erlef/setup-beam@v1
         with:
           otp-version: ${{matrix.pair.otp}}
           elixir-version: ${{matrix.pair.elixir}}
diff --git a/test/ex_doc/formatter/html/templates_test.exs b/test/ex_doc/formatter/html/templates_test.exs
index 4be1e2eac..658de8230 100644
--- a/test/ex_doc/formatter/html/templates_test.exs
+++ b/test/ex_doc/formatter/html/templates_test.exs
@@ -167,9 +167,12 @@ defmodule ExDoc.Formatter.HTML.TemplatesTest do
       content = Templates.sidebar_template(doc_config(), @empty_nodes_map)
 
       assert content =~
-               ~r{<div class="sidebar-header">\s*<div class="sidebar-projectDetails">\s*<a href="#{
-                 homepage_url()
-               }" class="sidebar-projectName">\s*Elixir\s*</a>\s*<strong class="sidebar-projectVersion">\s*v1.0.1\s*</strong>\s*</div>\s*</div>}
+               ~r"""
+               <div class="sidebar-header">\s*\
+               <div class="sidebar-projectDetails">\s*\
+               <a href="#{homepage_url()}" class="sidebar-projectName">\s*Elixir\s*</a>\s*\
+               <strong class="sidebar-projectVersion">\s*v1.0.1\s*</strong>\s*</div>\s*</div>\
+               """
     end
 
     test "text links to main when there is no homepage_url" do
@@ -183,7 +186,13 @@ defmodule ExDoc.Formatter.HTML.TemplatesTest do
       content = Templates.sidebar_template(config, @empty_nodes_map)
 
       assert content =~
-               ~r{<div class="sidebar-header">\s*<div class="sidebar-projectDetails">\s*<a href="hello.html" class="sidebar-projectName">\s*Elixir\s*</a>\s*<strong class="sidebar-projectVersion">\s*v1.0.1\s*</strong>\s*</div>\s*</div>}
+               ~r"""
+               <div class="sidebar-header">\s*\
+               <div class="sidebar-projectDetails">\s*\
+               <a href="hello.html" class="sidebar-projectName">\s*Elixir\s*</a>\s*\
+               <strong class="sidebar-projectVersion">\s*v1.0.1\s*</strong>\s*\
+               </div>\s*</div>\
+               """
     end
 
     test "enables nav link when module type have at least one element" do