diff --git a/rubygem-asciidoctor.spec b/rubygem-asciidoctor.spec
index 1d01a39..8f6e8ae 100644
--- a/rubygem-asciidoctor.spec
+++ b/rubygem-asciidoctor.spec
@@ -7,7 +7,7 @@
 Summary: A fast, open source AsciiDoc implementation in Ruby
 Name: rubygem-%{gem_name}
 Version: 2.0.12
-Release: 2%{?dist}
+Release: 3%{?dist}
 License: MIT
 URL: https://asciidoctor.org
 Source0: https://github.com/asciidoctor/asciidoctor/archive/%{gittag}/%{gem_name}-%{version}%{pre}.tar.gz
@@ -25,16 +25,16 @@ BuildRequires: ruby(abi) = 1.8
 %endif
 BuildRequires: rubygems-devel
 BuildRequires: ruby(rubygems)
-%if 0%{?rhel}
-# Dependencies aren't available on EPEL
-%else
 BuildRequires: rubygem(coderay)
-BuildRequires: rubygem(concurrent-ruby)
-BuildRequires: rubygem(erubi)
-BuildRequires: rubygem(haml)
 BuildRequires: rubygem(minitest)
 BuildRequires: rubygem(nokogiri)
 BuildRequires: rubygem(rouge)
+%if 0%{?rhel}
+# Dependencies aren't available on EPEL
+%else
+BuildRequires: rubygem(concurrent-ruby)
+BuildRequires: rubygem(erubi)
+BuildRequires: rubygem(haml)
 BuildRequires: rubygem(slim)
 BuildRequires: rubygem(tilt)
 %endif
@@ -83,10 +83,13 @@ gem build %{gem_name}.gemspec
 pushd .%{gem_instdir}
 
 %if 0%{?rhel}
-# Asciidoctor tests require Minitest 5, so we can't run them on EPEL
-%else
-LANG=C.UTF-8 ruby -I"lib:test" -e 'Dir.glob "./test/**/*_test.rb", &method(:require)'
+# Avoid rubygem(tilt) dependency, which is needed just for custom templates.
+sed -i '/require.*tilt/ s/^/#/' test/converter_test.rb
+sed -i -r '/template_dirs?:/i\      skip' test/converter_test.rb
+sed -i '/-T/i\    skip' test/{invoker,options}_test.rb
 %endif
+
+LANG=C.UTF-8 ruby -I"lib:test" -e 'Dir.glob "./test/**/*_test.rb", &method(:require)'
 popd
 
 %install
@@ -128,6 +131,10 @@ cp -a .%{gem_instdir}/man/*.1 \
 %doc %{gem_docdir}
 
 %changelog
+* Fri Jun 11 2021 Vít Ondruch <vondruch@redhat.com> - 2.0.12-3
+- Enable test suite.
+  Resolves: rhbz#1970776
+
 * Fri Apr 16 2021 Mohan Boddu <mboddu@redhat.com> - 2.0.12-2
 - Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937