diff --git a/test/libsolidity/semanticTests/smoke_test.sol b/test/libsolidity/semanticTests/smoke_test.sol
index 07cd79d0f..82f38656f 100644
--- a/test/libsolidity/semanticTests/smoke_test.sol
+++ b/test/libsolidity/semanticTests/smoke_test.sol
@@ -101,7 +101,7 @@ contract C {
 // g1() -> FAILURE
 // h(uint256,uint256): 1, -2 -> 3
 // j(bool): true -> false
-// k(bytes32): 0x10 -> 0x10, 0x10
+// k(bytes32): 0x1001 -> 0x1001, 0x1001
 // l(): hex"4200efef" -> 8
 // m(bytes): 32, 32, 0x20 -> 32, 32, 0x20
 // m(bytes): 32, 3, hex"AB33BB" -> 32, 3, left(0xAB33BB)
diff --git a/test/libsolidity/util/BytesUtils.cpp b/test/libsolidity/util/BytesUtils.cpp
index dd2a5166b..61ecead30 100644
--- a/test/libsolidity/util/BytesUtils.cpp
+++ b/test/libsolidity/util/BytesUtils.cpp
@@ -21,6 +21,8 @@
 
 #include <liblangutil/Common.h>
 
+#include <libdevcore/StringUtils.h>
+
 #include <boost/algorithm/string.hpp>
 
 #include <fstream>
@@ -159,13 +161,8 @@ string BytesUtils::formatBoolean(bytes const& _bytes)
 
 string BytesUtils::formatHex(bytes const& _bytes)
 {
-	stringstream os;
-
-	string hex{toHex(_bytes, HexPrefix::Add)};
-	boost::algorithm::replace_all(hex, "00", "");
-	os << hex;
-
-	return os.str();
+	u256 value = fromBigEndian<u256>(_bytes);
+	return toCompactHexWithPrefix(value);
 }
 
 string BytesUtils::formatHexString(bytes const& _bytes)
diff --git a/test/libsolidity/util/TestFunctionCall.cpp b/test/libsolidity/util/TestFunctionCall.cpp
index d22c3b3f0..272950782 100644
--- a/test/libsolidity/util/TestFunctionCall.cpp
+++ b/test/libsolidity/util/TestFunctionCall.cpp
@@ -193,7 +193,7 @@ string TestFunctionCall::formatBytesParameters(
 		fill_n(
 			back_inserter(defaultParameters),
 			ceil(_bytes.size() / 32),
-			Parameter{bytes(), "", ABIType{ABIType::UnsignedDec}, FormatInfo{}}
+			Parameter{bytes(), "", ABIType{ABIType::Hex}, FormatInfo{}}
 		);
 		ContractABIUtils::overwriteParameters(_errorReporter, defaultParameters, _parameters);
 		os << BytesUtils::formatBytesRange(_bytes, defaultParameters, _highlight);