diff --git a/testcommon/common.go b/testcommon/common.go
index 591d853..0b05ee5 100644
--- a/testcommon/common.go
+++ b/testcommon/common.go
@@ -4,6 +4,7 @@ package testcommon
 import "testing"
 import "strings"
 import "strconv"
+import "encoding/hex"
 
 // LogColumns logs columns of text side by side, each column 80 characters wide.
 func LogColumns (test *testing.T, width int, columns ...any) {
@@ -52,6 +53,12 @@ func Compare (test *testing.T, correct, got string) {
 		} else {
 			LogColumns(test, width, left, right)
 		}
-		
 	}
 }
+
+// CompareHex is like compare, but it prits out the differences in 
+func CompareHex (test *testing.T, correct, got string) {
+	correct = hex.Dump([]byte(correct))
+	got     = hex.Dump([]byte(got))
+	Compare(test, correct, got)
+}