diff --git a/src/secp256k1/src/valgrind_ctime_test.c b/src/secp256k1/src/valgrind_ctime_test.c
--- a/src/secp256k1/src/valgrind_ctime_test.c
+++ b/src/secp256k1/src/valgrind_ctime_test.c
@@ -25,6 +25,10 @@
 # include "include/secp256k1_extrakeys.h"
 #endif
 
+#if ENABLE_MODULE_SCHNORRSIG
+#include "include/secp256k1_schnorrsig.h"
+#endif
+
 int main(void) {
     secp256k1_context* ctx;
     secp256k1_ecdsa_signature signature;
@@ -151,6 +155,16 @@
     CHECK(ret == 1);
 #endif
 
+#if ENABLE_MODULE_SCHNORRSIG
+    VALGRIND_MAKE_MEM_UNDEFINED(key, 32);
+    ret = secp256k1_keypair_create(ctx, &keypair, key);
+    VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
+    CHECK(ret == 1);
+    ret = secp256k1_schnorrsig_sign(ctx, sig, msg, &keypair, NULL, NULL);
+    VALGRIND_MAKE_MEM_DEFINED(&ret, sizeof(ret));
+    CHECK(ret == 1);
+#endif
+
     secp256k1_context_destroy(ctx);
     return 0;
 }