diff --git a/src/test/fuzz/CMakeLists.txt b/src/test/fuzz/CMakeLists.txt
--- a/src/test/fuzz/CMakeLists.txt
+++ b/src/test/fuzz/CMakeLists.txt
@@ -108,6 +108,7 @@
 	script_flags
 	script_ops
 	scriptnum_ops
+	signature_checker
 	spanparsing
 	string
 	strprintf
diff --git a/src/test/fuzz/signature_checker.cpp b/src/test/fuzz/signature_checker.cpp
new file mode 100644
--- /dev/null
+++ b/src/test/fuzz/signature_checker.cpp
@@ -0,0 +1,72 @@
+// Copyright (c) 2009-2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <pubkey.h>
+#include <script/interpreter.h>
+
+#include <test/fuzz/FuzzedDataProvider.h>
+#include <test/fuzz/fuzz.h>
+
+#include <cstdint>
+#include <limits>
+#include <string>
+#include <vector>
+
+void initialize() {
+    static const auto verify_handle = std::make_unique<ECCVerifyHandle>();
+}
+
+namespace {
+class FuzzedSignatureChecker : public BaseSignatureChecker {
+    FuzzedDataProvider &m_fuzzed_data_provider;
+
+public:
+    FuzzedSignatureChecker(FuzzedDataProvider &fuzzed_data_provider)
+        : m_fuzzed_data_provider(fuzzed_data_provider) {}
+
+    virtual bool CheckSig(const std::vector<uint8_t> &scriptSig,
+                          const std::vector<uint8_t> &vchPubKey,
+                          const CScript &scriptCode, uint32_t flags) const {
+        return m_fuzzed_data_provider.ConsumeBool();
+    }
+
+    virtual bool CheckLockTime(const CScriptNum &nLockTime) const {
+        return m_fuzzed_data_provider.ConsumeBool();
+    }
+
+    virtual bool CheckSequence(const CScriptNum &nSequence) const {
+        return m_fuzzed_data_provider.ConsumeBool();
+    }
+
+    virtual ~FuzzedSignatureChecker() {}
+};
+} // namespace
+
+void test_one_input(const std::vector<uint8_t> &buffer) {
+    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
+    const unsigned int flags =
+        fuzzed_data_provider.ConsumeIntegral<unsigned int>();
+    const std::string script_string_1 =
+        fuzzed_data_provider.ConsumeRandomLengthString(65536);
+    const std::vector<uint8_t> script_bytes_1{script_string_1.begin(),
+                                              script_string_1.end()};
+    const std::string script_string_2 =
+        fuzzed_data_provider.ConsumeRandomLengthString(65536);
+    const std::vector<uint8_t> script_bytes_2{script_string_2.begin(),
+                                              script_string_2.end()};
+    std::vector<std::vector<uint8_t>> stack;
+    ScriptExecutionMetrics metrics;
+    ScriptError serror;
+    (void)EvalScript(stack, {script_bytes_1.begin(), script_bytes_1.end()},
+                     flags, FuzzedSignatureChecker(fuzzed_data_provider),
+                     metrics, &serror);
+    if ((flags & SCRIPT_VERIFY_CLEANSTACK) != 0 &&
+        (flags & SCRIPT_VERIFY_P2SH) == 0) {
+        return;
+    }
+    (void)VerifyScript({script_bytes_1.begin(), script_bytes_1.end()},
+                       {script_bytes_2.begin(), script_bytes_2.end()}, flags,
+                       FuzzedSignatureChecker(fuzzed_data_provider), metrics,
+                       &serror);
+}