diff --git a/perl-Math-BigInt-GMP.spec b/perl-Math-BigInt-GMP.spec
index 6f43bf2..df59c35 100644
--- a/perl-Math-BigInt-GMP.spec
+++ b/perl-Math-BigInt-GMP.spec
@@ -1,6 +1,8 @@
+%bcond_with author_tests
+
 Name:           perl-Math-BigInt-GMP
-Version:        1.51
-Release:        2%{?dist}
+Version:        1.6000
+Release:        1%{?dist}
 Summary:        Use the GMP library for Math::BigInt routines
 License:        GPL+ or Artistic
 URL:            http://search.cpan.org/dist/Math-BigInt-GMP/
@@ -27,15 +29,19 @@ BuildRequires:  perl(warnings)
 BuildRequires:  perl(XSLoader) >= 0.02
 # Test Suite
 BuildRequires:  perl(Math::BigFloat) >= 1.994
-BuildRequires:  perl(Math::BigInt) > 1.9997
+BuildRequires:  perl(Math::BigInt) >= 1.9998
 BuildRequires:  perl(Pod::Coverage) >= 0.18
 BuildRequires:  perl(Storable)
 BuildRequires:  perl(Test)
-BuildRequires:  perl(Test::More) >= 0.47
+BuildRequires:  perl(Test::More) >= 0.94
 BuildRequires:  perl(Test::Pod) >= 1.22
 BuildRequires:  perl(Test::Pod::Coverage) >= 1.08
 BuildRequires:  perl(threads)
 BuildRequires:  perl(vars)
+# Author Tests
+%if %{with author_tests}
+BuildRequires:  perl(Config::Tiny)
+%endif
 # Runtime
 Requires:       perl(:MODULE_COMPAT_%(eval "`perl -V:version`"; echo $version))
 
@@ -68,7 +74,7 @@ find %{buildroot} -type f -name '*.bs' -empty -delete
 %{_fixperms} %{buildroot}
 
 %check
-make test
+make test %{?_with_author_tests:AUTHOR_TESTING=1}
 
 %files
 %license LICENSE
@@ -78,6 +84,21 @@ make test
 %{_mandir}/man3/Math::BigInt::GMP.3*
 
 %changelog
+* Fri Nov 18 2016 Paul Howarth <paul@city-fan.org> - 1.6000-1
+- Update to 1.6000
+  - Sync test files with Math-BigInt-1.999800
+  - Update bundled Devel::CheckLib from v1.03 to v1.07
+  - Math::BigInt::GMP is now a subclass of Math::BigInt::Lib, so remove pure
+    Perl methods from Math::BigInt::GMP that are implemented in the superclass
+    Math::BigInt::Lib; the methods removed are _digit(), _num(), _nok(), and
+    _log_int() (the version of _log_int() implemented in Math::BigInt::GMP was
+    buggy anyway)
+  - Fix _check() so it doesn't give a "use of uninitialized value" warning if
+    given an undefined "object"
+  - Trim whitespace in all files
+  - Better use of the functionality in Test::More in t/bigintg.t
+- Add support for build --with author_tests
+
 * Sun May 15 2016 Jitka Plesnikova <jplesnik@redhat.com> - 1.51-2
 - Perl 5.24 rebuild
 
diff --git a/sources b/sources
index 14fabe7..538ec4f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-8031a287150f5f1b292e9a970447deff  Math-BigInt-GMP-1.51.tar.gz
+226dc854ceb7923fcfea3a08484c1cdd  Math-BigInt-GMP-1.6000.tar.gz