always use the core serializers in EUMM for core tests

diff --git a/cpan/ExtUtils-MakeMaker/t/min_perl_version.t b/cpan/ExtUtils-MakeMaker/t/min_perl_version.t
index 6bff1bf..8c8f801 100644 (file)
--- a/cpan/ExtUtils-MakeMaker/t/min_perl_version.t
+++ b/cpan/ExtUtils-MakeMaker/t/min_perl_version.t
@@ -52,6 +52,7 @@ END
 );
 
 # avoid environment variables interfering with our make runs
+delete @ENV{qw(PERL_JSON_BACKEND CPAN_META_JSON_BACKEND PERL_YAML_BACKEND)} if $ENV{PERL_CORE};
 delete @ENV{qw(LIB MAKEFLAGS PERL_CORE)};
 
 my $perl     = which_perl();

diff --git a/cpan/ExtUtils-MakeMaker/t/several_authors.t b/cpan/ExtUtils-MakeMaker/t/several_authors.t
index 027393c..f1b0f1e 100644 (file)
--- a/cpan/ExtUtils-MakeMaker/t/several_authors.t
+++ b/cpan/ExtUtils-MakeMaker/t/several_authors.t
@@ -52,6 +52,7 @@ END
 );
 
 # avoid environment variables interfering with our make runs
+delete @ENV{qw(PERL_JSON_BACKEND CPAN_META_JSON_BACKEND PERL_YAML_BACKEND)} if $ENV{PERL_CORE};
 delete @ENV{qw(LIB MAKEFLAGS PERL_CORE)};
 
 my $perl     = which_perl();