diff --git a/test/ken/interbasic.go b/test/ken/interbasic.go
new file mode 100644
index 0000000..2603d25
--- /dev/null
+++ b/test/ken/interbasic.go
@@ -0,0 +1,104 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+type	myint		int;
+type	mystring	string;
+type	I0		interface {};
+
+func
+f()
+{
+	var ia, ib I0;
+	var i myint;
+	var s mystring;
+
+	if ia != ib { panicln("1"); }
+
+	i = 1;
+	ia = i;
+	ib = i;
+	if ia != ib { panicln("2"); }
+	if ia == nil { panicln("3"); }
+
+	i = 2;
+	ia = i;
+	if ia == ib { panicln("4"); }
+
+	ia = nil;
+	if ia == ib { panicln("5"); }
+
+	ib = nil;
+	if ia != ib { panicln("6"); }
+
+	if ia != nil { panicln("7"); }
+
+	s = "abc";
+	ia = s;
+	ib = nil;
+	if ia == ib { panicln("8"); }
+
+	s = "def";
+	ib = s;
+	if ia == ib { panicln("9"); }
+
+	s = "abc";
+	ib = s;
+	if ia != ib { panicln("a"); }
+}
+
+func
+main()
+{
+	var ia [20]I0;
+	var b bool;
+	var s string;
+	var i8 int8;
+	var i16 int16;
+	var i32 int32;
+	var i64 int64;
+	var u8 uint8;
+	var u16 uint16;
+	var u32 uint32;
+	var u64 uint64;
+
+	f();
+
+	ia[0] = "xxx";
+	ia[1] = 12345;
+	ia[2] = true;
+
+	s = "now is";	ia[3] = s;
+	b = false;	ia[4] = b;
+
+	i8 = 29;	ia[5] = i8;
+	i16 = 994;	ia[6] = i16;
+	i32 = 3434;	ia[7] = i32;
+	i64 = 1234567;	ia[8] = i64;
+
+	u8 = 12;	ia[9] = u8;
+	u16 = 799;	ia[10] = u16;
+	u32 = 4455;	ia[11] = u32;
+	u64 = 765432;	ia[12] = u64;
+
+	s = ia[0];	if s != "xxx" { panicln(0,s); }
+	i32 = ia[1];	if i32 != 12345 { panicln(1,i32); }
+	b = ia[2];	if b != true { panicln(2,b); }
+
+	s = ia[3];	if s != "now is" { panicln(3,s); }
+	b = ia[4];	if b != false { panicln(4,b); }
+
+	i8 = ia[5];	if i8 != 29 { panicln(5,i8); }
+	i16 = ia[6];	if i16 != 994 { panicln(6,i16); }
+	i32 = ia[7];	if i32 != 3434 { panicln(7,i32); }
+	i64 = ia[8];	if i64 != 1234567 { panicln(8,i64); }
+
+	u8 = ia[9];	if u8 != 12 { panicln(5,u8); }
+	u16 = ia[10];	if u16 != 799 { panicln(6,u16); }
+	u32 = ia[11];	if u32 != 4455 { panicln(7,u32); }
+	u64 = ia[12];	if u64 != 765432 { panicln(8,u64); }
+}