diff --git a/packages/ripple-keypairs/src/index.ts b/packages/ripple-keypairs/src/index.ts
index bfe65c7b..631d444e 100644
--- a/packages/ripple-keypairs/src/index.ts
+++ b/packages/ripple-keypairs/src/index.ts
@@ -104,6 +104,7 @@ function deriveKeypair(seed, options) {
   const keypair = method.deriveKeypair(decoded.bytes, options)
   const messageToVerify = hash('This test message should verify.')
   const signature = method.sign(messageToVerify, keypair.privateKey)
+  /* istanbul ignore if */
   if (method.verify(messageToVerify, signature, keypair.publicKey) !== true) {
     throw new Error('derived keypair did not generate verifiable signature')
   }
diff --git a/packages/ripple-keypairs/src/secp256k1.ts b/packages/ripple-keypairs/src/secp256k1.ts
index 282cd69f..d55daadc 100644
--- a/packages/ripple-keypairs/src/secp256k1.ts
+++ b/packages/ripple-keypairs/src/secp256k1.ts
@@ -15,10 +15,12 @@ function deriveScalar(bytes, discrim?: number) {
     }
     hasher.addU32(i)
     const key = hasher.first256BN()
+    /* istanbul ignore else */
     if (key.cmpn(0) > 0 && key.cmp(order) < 0) {
       return key
     }
   }
+  /* istanbul ignore next */
   throw new Error('impossible unicorn ;)')
 }