diff --git a/src/merkle.rs b/src/merkle.rs
index 65086b9..d50f6a5 100644
--- a/src/merkle.rs
+++ b/src/merkle.rs
@@ -52,28 +52,63 @@ impl Proof {
     }
 }
 
-// TODO: add tests
+#[cfg(test)]
+mod tests {
+    use bitcoin::{consensus::encode::deserialize, Block, Txid};
+    use std::path::Path;
 
-// //  {"id":37,"jsonrpc":"2.0",
-// "result":{"block_height":333961,"merkle":[
-//     "5d8cfb001d9ec17861ad9c158244239cb6e3298a619b2a5f7b176ddd54459c75",
-//     "06811172e13312f2e496259d2c8a7262f1192be5223fcf4d6a9ed7f58a2175ba",
-//     "cbcec841dea3294706809d1510c72b4424d141fac89106af65b70399b1d79f3f",
-//     "a24d6c3601a54d40f4350e6c8887bf82a873fe8619f95c772b573ec0373119d3",
-//     "2015c1bb133ee2c972e55fdcd205a9aee7b0122fd74c2f5d5d27b24a562c7790",
-//     "f379496fef2e603c4e1c03e2179ebaf5153d6463b8d61aa16d41db3321a18165",
-//     "7a798d6529663fd472d26cc90c434b64f78955747ac2f93c8dcd35b8f684946e",
-//     "ad3811062b8db664f2342cbff1b491865310b74416dd7b901f14d980886821f8"],"pos":157}}
-// //  {"id":38,"jsonrpc":"2.0",
-// "result":{"block_height":437303,"merkle":[
-//     "d29769df672657689fd6d293b416ee9211c77fbe243ab7820813f327b0e8dd47",
-//     "d71f0947b47cab0f64948acfe52d41c293f492fe9627690c330d4004f2852ce4",
-//     "5f36c4330c727d7c8d98cc906cb286f13a61b5b4cab2124c5d041897834b42d8",
-//     "e77d181f83355ed38d0e6305fdb87c9637373fd90d1dfb911262ac55d260181e",
-//     "a8f83ca44dc486d9d45c4cff9567839c254bda96e6960d310a5e471c70c6a95b",
-//     "e9a5ff7f74cb060b451ed2cd27de038efff4df911f4e0f99e2661b46ebcc7e1c",
-//     "6b0144095e3f0e0d0551cbaa6c5dfc89387024f836528281b6d290e356e196cf",
-//     "bb0761b0636ffd387e0ce322289a3579e926b6813e090130a88228bd80cff982",
-//     "ac327124304cccf6739da308a25bb365a6b63e9344bad2be139b0b02c042567c",
-//     "42e11f2d67050cd31295f85507ebc7706fc4c1fddf1e5a45b98ae3f7c63d2592",
-//     "52657042fcfc88067524bf6c5f9a66414c7de4f4fcabcb65bca56fa84cf309b4"],"pos":6}}
+    use super::Proof;
+
+    #[test]
+    fn test_merkle() {
+        let proof = Proof::create(
+            &load_block_txids("00000000000000001203c1ea455e38612bdf36e9967fdead11935c8e22283ecc"),
+            157,
+        );
+        assert_eq!(
+            proof.to_hex(),
+            vec![
+                "5d8cfb001d9ec17861ad9c158244239cb6e3298a619b2a5f7b176ddd54459c75",
+                "06811172e13312f2e496259d2c8a7262f1192be5223fcf4d6a9ed7f58a2175ba",
+                "cbcec841dea3294706809d1510c72b4424d141fac89106af65b70399b1d79f3f",
+                "a24d6c3601a54d40f4350e6c8887bf82a873fe8619f95c772b573ec0373119d3",
+                "2015c1bb133ee2c972e55fdcd205a9aee7b0122fd74c2f5d5d27b24a562c7790",
+                "f379496fef2e603c4e1c03e2179ebaf5153d6463b8d61aa16d41db3321a18165",
+                "7a798d6529663fd472d26cc90c434b64f78955747ac2f93c8dcd35b8f684946e",
+                "ad3811062b8db664f2342cbff1b491865310b74416dd7b901f14d980886821f8"
+            ]
+        );
+
+        let proof = Proof::create(
+            &load_block_txids("000000000000000002d249a3d89f63ef3fee203adcca7c24008c13fd854513f2"),
+            6,
+        );
+        assert_eq!(
+            proof.to_hex(),
+            vec![
+                "d29769df672657689fd6d293b416ee9211c77fbe243ab7820813f327b0e8dd47",
+                "d71f0947b47cab0f64948acfe52d41c293f492fe9627690c330d4004f2852ce4",
+                "5f36c4330c727d7c8d98cc906cb286f13a61b5b4cab2124c5d041897834b42d8",
+                "e77d181f83355ed38d0e6305fdb87c9637373fd90d1dfb911262ac55d260181e",
+                "a8f83ca44dc486d9d45c4cff9567839c254bda96e6960d310a5e471c70c6a95b",
+                "e9a5ff7f74cb060b451ed2cd27de038efff4df911f4e0f99e2661b46ebcc7e1c",
+                "6b0144095e3f0e0d0551cbaa6c5dfc89387024f836528281b6d290e356e196cf",
+                "bb0761b0636ffd387e0ce322289a3579e926b6813e090130a88228bd80cff982",
+                "ac327124304cccf6739da308a25bb365a6b63e9344bad2be139b0b02c042567c",
+                "42e11f2d67050cd31295f85507ebc7706fc4c1fddf1e5a45b98ae3f7c63d2592",
+                "52657042fcfc88067524bf6c5f9a66414c7de4f4fcabcb65bca56fa84cf309b4"
+            ]
+        );
+    }
+
+    fn load_block_txids(block_hash_hex: &str) -> Vec<Txid> {
+        let path = Path::new("src")
+            .join("tests")
+            .join("blocks")
+            .join(block_hash_hex);
+        eprintln!("{:?}", path);
+        let data = std::fs::read(path).unwrap();
+        let block: Block = deserialize(&data).unwrap();
+        block.txdata.iter().map(|tx| tx.txid()).collect()
+    }
+}
diff --git a/src/tests/blocks/000000000000000002d249a3d89f63ef3fee203adcca7c24008c13fd854513f2 b/src/tests/blocks/000000000000000002d249a3d89f63ef3fee203adcca7c24008c13fd854513f2
new file mode 100644
index 0000000..7f9598c
Binary files /dev/null and b/src/tests/blocks/000000000000000002d249a3d89f63ef3fee203adcca7c24008c13fd854513f2 differ
diff --git a/src/tests/blocks/00000000000000001203c1ea455e38612bdf36e9967fdead11935c8e22283ecc b/src/tests/blocks/00000000000000001203c1ea455e38612bdf36e9967fdead11935c8e22283ecc
new file mode 100644
index 0000000..7d65942
Binary files /dev/null and b/src/tests/blocks/00000000000000001203c1ea455e38612bdf36e9967fdead11935c8e22283ecc differ