diff --git a/perl-constant.spec b/perl-constant.spec
index 52d2021..4943b56 100644
--- a/perl-constant.spec
+++ b/perl-constant.spec
@@ -9,7 +9,7 @@
 
 Name:           perl-constant
 Version:        1.33
-Release:        491%{?dist}
+Release:        492%{?dist}
 Summary:        Perl pragma to declare constants
 License:        GPL-1.0-or-later OR Artistic-1.0-Perl
 URL:            https://metacpan.org/release/constant
@@ -17,10 +17,12 @@ Source0:        https://cpan.metacpan.org/authors/id/S/SA/SAPER/constant-%{cpan_
 # Update to 1.33
 Patch0:         constant-1.33-update.patch
 BuildArch:      noarch
-BuildRequires: make
-BuildRequires:  perl-interpreter
+BuildRequires:  coreutils
+BuildRequires:  make
 BuildRequires:  perl-generators
-BuildRequires:  perl(ExtUtils::MakeMaker)
+BuildRequires:  perl-interpreter
+BuildRequires:  perl(Config)
+BuildRequires:  perl(ExtUtils::MakeMaker) >= 6.76
 BuildRequires:  perl(strict)
 # Run-time:
 BuildRequires:  perl(Carp)
@@ -54,28 +56,61 @@ value at compile time, and may then optimize the expression further.
 In particular, any code in an "if (CONSTANT)" block will be optimized
 away if the constant is false.
 
+%package tests
+Summary:        Tests for %{name}
+Requires:       %{name} = %{?epoch:%{epoch}:}%{version}-%{release}
+Requires:       perl-Test-Harness
+
+%description tests
+Tests from %{name}. Execute them
+with "%{_libexecdir}/%{name}/test".
+
 %prep
 %setup -q -n constant-%{cpan_version}
-%patch0 -p1
+%patch -P0 -p1
+
+# Help generators to recognize Perl scripts
+for F in t/*.t; do
+    perl -i -MConfig -ple 'print $Config{startperl} if $. == 1 && !s{\A#!.*perl\b}{$Config{startperl}}' "$F"
+    chmod +x "$F"
+done
 
 %build
-perl Makefile.PL INSTALLDIRS=vendor
-make %{?_smp_mflags}
+perl Makefile.PL INSTALLDIRS=vendor NO_PACKLIST=1 NO_PERLLOCAL=1
+%{make_build}
 
 %install
-make pure_install DESTDIR=$RPM_BUILD_ROOT
-find $RPM_BUILD_ROOT -type f -name .packlist -exec rm -f {} \;
-%{_fixperms} $RPM_BUILD_ROOT/*
+%{make_install}
+%{_fixperms} %{buildroot}/*
+
+# Install tests
+mkdir -p %{buildroot}%{_libexecdir}/%{name}
+cp -a t %{buildroot}%{_libexecdir}/%{name}
+# Remove author tests
+rm %{buildroot}%{_libexecdir}/%{name}/t/more*
+rm %{buildroot}%{_libexecdir}/%{name}/t/pod*
+cat > %{buildroot}%{_libexecdir}/%{name}/test << 'EOF'
+#!/bin/sh
+cd %{_libexecdir}/%{name} && exec prove -I . -j "$(getconf _NPROCESSORS_ONLN)"
+EOF
+chmod +x %{buildroot}%{_libexecdir}/%{name}/test
 
 %check
 make test
 
 %files
 %doc Changes eg README
-%{perl_vendorlib}/*
-%{_mandir}/man3/*
+%{perl_vendorlib}/constant*
+%{_mandir}/man3/constant*
+
+%files tests
+%{_libexecdir}/%{name}
 
 %changelog
+* Mon May 22 2023 Jitka Plesnikova <jplesnik@redhat.com> - 1.33-492
+- Modernize spec
+- Package tests
+
 * Fri Jan 20 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.33-491
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild