1 files changed, 23 insertions, 0 deletions
diff --git a/ext/base/t/isa.t b/ext/base/t/isa.t
new file mode 100644
index 0000000000..bd5ee7fc3c
--- /dev/null
+++ b/ext/base/t/isa.t
@@ -0,0 +1,23 @@
+#!/usr/bin/perl -w
+
+# Regression test some quirky behavior of base.pm.
+
+use strict;
+use Test::More tests => 1;
+
+{
+    package Parent;
+
+    sub foo { 42 }
+
+    package Middle;
+
+    use base qw(Parent);
+
+    package Child;
+
+    base->import(qw(Middle Parent));
+}
+
+is_deeply [@Child::ISA], [qw(Middle)],
+          'base.pm will not add to @ISA if you already are-a';