diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -642,6 +642,24 @@
                                 "BIP66 example 4, with DERSIG",
                                 SCRIPT_VERIFY_DERSIG)
                         .Num(0));
+    tests.push_back(
+        TestBuilder(
+            CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG << OP_NOT,
+            "BIP66 example 4, with DERSIG, non-null DER-compliant signature",
+            SCRIPT_VERIFY_DERSIG)
+            .Push("300602010102010101"));
+    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C)
+                                          << OP_CHECKSIG << OP_NOT,
+                                "BIP66 example 4, with DERSIG and NULLFAIL",
+                                SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_NULLFAIL)
+                        .Num(0));
+    tests.push_back(TestBuilder(CScript() << ToByteVector(keys.pubkey1C)
+                                          << OP_CHECKSIG << OP_NOT,
+                                "BIP66 example 4, with DERSIG and NULLFAIL, "
+                                "non-null DER-compliant signature",
+                                SCRIPT_VERIFY_DERSIG | SCRIPT_VERIFY_NULLFAIL)
+                        .Push("300602010102010101")
+                        .ScriptError(SCRIPT_ERR_SIG_NULLFAIL));
     tests.push_back(
         TestBuilder(CScript() << ToByteVector(keys.pubkey1C) << OP_CHECKSIG,
                     "BIP66 example 5, without DERSIG", 0)