Reference the right pipe

This didn't affect the results [ci skip]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tests/test_filters.cpp b/src/tests/test_filters.cpp
index af00ae4fc..7de68accb 100644
--- a/src/tests/test_filters.cpp
+++ b/src/tests/test_filters.cpp
@@ -335,7 +335,7 @@ class Filter_Tests : public Test
             result.test_eq("encrypt", enc_pipe.read_all_as_string(i), cfb_expected[i]);
             }
 
-         for(size_t i = 0; i != enc_pipe.message_count(); ++i)
+         for(size_t i = 0; i != dec_pipe.message_count(); ++i)
             {
             result.test_eq("decrypt", dec_pipe.read_all_as_string(i),
                            Botan::hex_encode(msg_bits, i+1));