diff --git a/perl-Syntax-Keyword-Junction.spec b/perl-Syntax-Keyword-Junction.spec
index 7bbfaee..4f9d360 100644
--- a/perl-Syntax-Keyword-Junction.spec
+++ b/perl-Syntax-Keyword-Junction.spec
@@ -18,7 +18,10 @@ BuildRequires:  perl(overload)
 BuildRequires:  perl(Sub::Exporter::Progressive) >= 0.001006
 # Tests:
 BuildRequires:  perl(Test::More) >= 0.88
+BuildRequires:  perl(Test::Requires) >= 0.07
 BuildRequires:  perl(syntax)
+# Optional tests:
+BuildRequires:  perl(Sub::Exporter) >= 0.986
 Requires:       perl(:MODULE_COMPAT_%(eval "`perl -V:version`"; echo $version))
 Requires:       perl(overload)
 Requires:       perl(Sub::Exporter::Progressive) >= 0.001006