diff --git a/CPANPLUS-0.9178-Do-not-run-t-08_CPANPLUS-Backend.t-parallel.patch b/CPANPLUS-0.9178-Do-not-run-t-08_CPANPLUS-Backend.t-parallel.patch
new file mode 100644
index 0000000..782dd91
--- /dev/null
+++ b/CPANPLUS-0.9178-Do-not-run-t-08_CPANPLUS-Backend.t-parallel.patch
@@ -0,0 +1,42 @@
+From 2d3a8411908f4f24e19a7e4bb99a845c09accf81 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
+Date: Fri, 26 Jul 2019 14:34:04 +0200
+Subject: [PATCH] Do not run t/08_CPANPLUS-Backend.t parallel
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+When running tests in parallel, tests sometimes fail and always in
+t/08_CPANPLUS-Backend.t. This patch defines test rules for
+TAP::Harness to run t/08_CPANPLUS-Backend.t always isolated.
+
+https://rt.cpan.org/Ticket/Display.html?id=59085
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ MANIFEST        | 1 +
+ t/testrules.yml | 4 ++++
+ 2 files changed, 5 insertions(+)
+ create mode 100644 t/testrules.yml
+
+diff --git a/MANIFEST b/MANIFEST
+index a37d0ee..78a0091 100644
+--- a/MANIFEST
++++ b/MANIFEST
+@@ -161,3 +161,4 @@ t/dummy-perl/lib/.hidden
+ t/dummy-perl/man/man1/.hidden
+ t/dummy-perl/man/man3/.hidden
+ t/inc/conf.pl
++t/testrules.yml
+diff --git a/t/testrules.yml b/t/testrules.yml
+new file mode 100644
+index 0000000..865f576
+--- /dev/null
++++ b/t/testrules.yml
+@@ -0,0 +1,4 @@
++# CPAN RT#59085
++seq:
++    - seq: 't/08_CPANPLUS-Backend.t'
++    - par: '**'
+-- 
+2.20.1
+
diff --git a/perl-CPANPLUS.spec b/perl-CPANPLUS.spec
index 588e109..f1cc576 100644
--- a/perl-CPANPLUS.spec
+++ b/perl-CPANPLUS.spec
@@ -1,7 +1,7 @@
 %global cpan_version 0.9178
 Name:           perl-CPANPLUS
 Version:        0.917.800
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Ameliorated interface to the Comprehensive Perl Archive Network
 # Other files:                              GPL+ or Artistic
 ## Unbundled, not used
@@ -9,6 +9,8 @@ Summary:        Ameliorated interface to the Comprehensive Perl Archive Network
 License:        GPL+ or Artistic
 URL:            https://metacpan.org/release/CPANPLUS
 Source0:        https://cpan.metacpan.org/authors/id/B/BI/BINGOS/CPANPLUS-%{cpan_version}.tar.gz
+# Make parallel testing more reliable, CPAN RT#59085
+Patch0:         CPANPLUS-0.9178-Do-not-run-t-08_CPANPLUS-Backend.t-parallel.patch
 BuildArch:      noarch
 BuildRequires:  coreutils
 BuildRequires:  make
@@ -61,6 +63,7 @@ BuildRequires:  perl(Object::Accessor)
 BuildRequires:  perl(overload)
 BuildRequires:  perl(Package::Constants)
 BuildRequires:  perl(Params::Check)
+# Parse::CPAN::Meta also for loading t/testrules.yml at tests
 BuildRequires:  perl(Parse::CPAN::Meta)
 BuildRequires:  perl(strict)
 BuildRequires:  perl(Term::ReadLine)
@@ -94,6 +97,7 @@ interactive shells, command line programs, etc., that use this API.
 
 %prep
 %setup -q -n CPANPLUS-%{cpan_version}
+%patch0 -p1
 # Removed unused bootstrap modules (required only when updating CPANPLUS with
 # CPANPLUS when Module::Build is preferred by CPANPLUS)
 rm -rf bundled
@@ -131,6 +135,9 @@ make test
 %{_mandir}/man3/*
 
 %changelog
+* Fri Jul 26 2019 Petr Pisar <ppisar@redhat.com> - 0.917.800-3
+- Make parallel testing more reliable (CPAN RT#59085)
+
 * Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.917.800-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild