diff --git a/test/tools/ossfuzz/const_opt_ossfuzz.cpp b/test/tools/ossfuzz/const_opt_ossfuzz.cpp
index b394d7daf..fc77332e6 100644
--- a/test/tools/ossfuzz/const_opt_ossfuzz.cpp
+++ b/test/tools/ossfuzz/const_opt_ossfuzz.cpp
@@ -22,6 +22,6 @@ using namespace std;
 extern "C" int LLVMFuzzerTestOneInput(uint8_t const* _data, size_t _size)
 {
 	string input(reinterpret_cast<char const*>(_data), _size);
-	FuzzerUtil::testConstantOptimizer(input, true);
+	FuzzerUtil::testConstantOptimizer(input, /*quiet=*/true);
 	return 0;
 }
\ No newline at end of file
diff --git a/test/tools/ossfuzz/yulProtoFuzzer.cpp b/test/tools/ossfuzz/yulProtoFuzzer.cpp
index b959bc1d8..c4416a61e 100644
--- a/test/tools/ossfuzz/yulProtoFuzzer.cpp
+++ b/test/tools/ossfuzz/yulProtoFuzzer.cpp
@@ -33,6 +33,8 @@ using namespace std;
 DEFINE_BINARY_PROTO_FUZZER(Function const& _input)
 {
 	string yul_source = functionToString(_input);
+	if (yul_source.size() > 600)
+		return;
 
 	if (const char* dump_path = getenv("PROTO_FUZZER_DUMP_PATH"))
 	{
diff --git a/test/tools/ossfuzz/yulProto_diff_ossfuzz.cpp b/test/tools/ossfuzz/yulProto_diff_ossfuzz.cpp
index 0d210e092..72e320ef5 100644
--- a/test/tools/ossfuzz/yulProto_diff_ossfuzz.cpp
+++ b/test/tools/ossfuzz/yulProto_diff_ossfuzz.cpp
@@ -39,6 +39,8 @@ using namespace yul::test;
 DEFINE_BINARY_PROTO_FUZZER(Function const& _input)
 {
 	string yul_source = functionToString(_input);
+	if (yul_source.size() > 600)
+		return;
 
 	if (const char* dump_path = getenv("PROTO_FUZZER_DUMP_PATH"))
 	{