diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index df3180d..21cdcf7 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -7,7 +7,10 @@ on:
       - feat/**
       - fix/**
       - chore/**
+      - test/**
       - ci/**
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+
 
   pull_request:
     branches:
diff --git a/Cargo.toml b/Cargo.toml
index ff64c32..8a3fad1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,4 +32,5 @@ aws-sdk-kms = "1.37.0"
 [dev-dependencies]
 serde_json = "1.0.120"
 serde_plain = "1.0.2"
-tokio-test = "0.4.4"
\ No newline at end of file
+tokio-test = "0.4.4"
+lazy_static = "1.5.0"
\ No newline at end of file
diff --git a/Makefile b/Makefile
index 2e45636..48a7630 100644
--- a/Makefile
+++ b/Makefile
@@ -9,6 +9,9 @@ doc:
 
 .PHONY: test
 test:
+ifndef KMS_KEY_ID
+	$(error KMS_KEY_ID is not set)
+endif
 	cargo fmt
 	cargo test --lib --tests
 
@@ -18,6 +21,9 @@ test-coverage:
 
 .PHONY: test-doc
 test-doc:
+ifndef KMS_KEY_ID
+	$(error KMS_KEY_ID is not set)
+endif
 	cargo test --doc
 
 .PHONY: unit-test
@@ -25,6 +31,9 @@ unit-test:
 	cargo test --lib
 
 .PHONY: integration-tests
+ifndef KMS_KEY_ID
+	$(error KMS_KEY_ID is not set)
+endif
 integration-test:
 	cargo test --tests
 
diff --git a/tests/data/52c9a19f-bcfd-46a7-bd56-6d0cf98d8616.der b/tests/data/pub-key.der
similarity index 100%
rename from tests/data/52c9a19f-bcfd-46a7-bd56-6d0cf98d8616.der
rename to tests/data/pub-key.der
diff --git a/tests/data/52c9a19f-bcfd-46a7-bd56-6d0cf98d8616.pem b/tests/data/pub-key.pem
similarity index 100%
rename from tests/data/52c9a19f-bcfd-46a7-bd56-6d0cf98d8616.pem
rename to tests/data/pub-key.pem
diff --git a/tests/evm_account_test.rs b/tests/evm_account_test.rs
index 813be7e..f19057b 100644
--- a/tests/evm_account_test.rs
+++ b/tests/evm_account_test.rs
@@ -1,7 +1,9 @@
 mod evm_account {
     mod integration_tests {
+        use lazy_static::lazy_static;
         use serde_json;
         use serde_plain;
+        use std::env;
         use std::fs::File;
 
         use evm_signer_kms::evm_account::{
@@ -14,16 +16,29 @@ mod evm_account {
             EvmAccount,
         };
 
-        const KMS_KEY_ID: &str = "52c9a19f-bcfd-46a7-bd56-6d0cf98d8616";
+        // Reads the KMS_KEY_ID environment variable using lazy static evaluation.
+        // Assumes no default value and fails if the key ID is not set!
+        const KMS_KEY_ID_VAR_NAME: &str = "KMS_KEY_ID";
+        lazy_static! {
+            static ref KMS_KEY_ID: String = env::var(KMS_KEY_ID_VAR_NAME).expect(
+                format!("⚠️ `{}` environment variable not set", KMS_KEY_ID_VAR_NAME).as_str()
+            );
+        }
+
         const TEST_TO_ADDRESS_BYTES: [u8; 20] = [
             0xa9, 0xd8, 0x91, 0x86, 0xca, 0xa6, 0x63, 0xc8, 0xef, 0x03, 0x52, 0xfd, 0x1d, 0xb3,
             0x59, 0x62, 0x80, 0x62, 0x55, 0x73,
         ];
 
-        // Only verifies if the signature can be generated
+        // NOTE: Digest signatures from KMS are non-deterministic, so the output of this test will
+        // vary. For this reason, the test is not asserting any specific value, but rather just
+        // assess whether transaction encoding can be performed without errors.
+        //
+        // The transactions are printed, so that they can be manually verified.
+
         #[tokio::test]
         async fn sign_transaction_succeed() {
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx = FreeMarketTransaction {
@@ -45,14 +60,17 @@ mod evm_account {
                 .await
                 .unwrap();
 
+            // Print the signed transaction bytes for manual verification
             println!("{:02x?}", signed_tx);
+
+            assert!(true);
         }
 
         #[tokio::test]
         async fn encode_signed_legacy_tx_succeed() {
             const TX_FILE_PATH: &str = "tests/data/valid-legacy-tx-01.json";
 
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx_file = File::open(TX_FILE_PATH).unwrap();
@@ -67,15 +85,17 @@ mod evm_account {
 
             let signed_tx_encoding_string = serde_plain::to_string(&signed_tx).unwrap();
 
-            // TODO: Verify the encoding string
+            // Print the signed transaction bytes for manual verification
             println!("{}", signed_tx_encoding_string);
+
+            assert!(true);
         }
 
         #[tokio::test]
         async fn encode_signed_access_list_tx_succeed() {
             const TX_FILE_PATH: &str = "tests/data/valid-access-list-tx-02.json";
 
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx_file = File::open(TX_FILE_PATH).unwrap();
@@ -90,15 +110,17 @@ mod evm_account {
 
             let signed_tx_encoding_string = serde_plain::to_string(&signed_tx).unwrap();
 
-            // TODO: Verify the encoding string
+            // Print the signed transaction bytes for manual verification
             println!("{}", signed_tx_encoding_string);
+
+            assert!(true);
         }
 
         #[tokio::test]
         async fn encode_signed_free_market_tx_no_access_list_succeed() {
             const TX_FILE_PATH: &str = "tests/data/valid-free-market-tx-01.json";
 
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx_file = File::open(TX_FILE_PATH).unwrap();
@@ -113,15 +135,17 @@ mod evm_account {
 
             let signed_tx_encoding_string = serde_plain::to_string(&signed_tx).unwrap();
 
-            // TODO: Verify the encoding string
+            // Print the signed transaction bytes for manual verification
             println!("{}", signed_tx_encoding_string);
+
+            assert!(true);
         }
 
         #[tokio::test]
         async fn encode_signed_free_market_tx_with_access_list_1_succeed() {
             const TX_FILE_PATH: &str = "tests/data/valid-free-market-tx-03.json";
 
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx_file = File::open(TX_FILE_PATH).unwrap();
@@ -136,15 +160,17 @@ mod evm_account {
 
             let signed_tx_encoding_string = serde_plain::to_string(&signed_tx).unwrap();
 
-            // TODO: Verify the encoding string
+            // Print the signed transaction bytes for manual verification
             println!("{}", signed_tx_encoding_string);
+
+            assert!(true);
         }
 
         #[tokio::test]
         async fn encode_signed_free_market_tx_with_access_list_2_succeed() {
             const TX_FILE_PATH: &str = "tests/data/valid-free-market-tx-04.json";
 
-            let kms_key = &kms_key::KmsKey::new(KMS_KEY_ID).await;
+            let kms_key = &kms_key::KmsKey::new(&KMS_KEY_ID).await;
             let evm_account = EvmAccount::new(kms_key);
 
             let tx_file = File::open(TX_FILE_PATH).unwrap();
@@ -159,8 +185,10 @@ mod evm_account {
 
             let signed_tx_encoding_string = serde_plain::to_string(&signed_tx).unwrap();
 
-            // TODO: Verify the encoding string
+            // Print the signed transaction bytes for manual verification
             println!("{}", signed_tx_encoding_string);
+
+            assert!(true);
         }
     }
 }
diff --git a/tests/kms_key_test.rs b/tests/kms_key_test.rs
index 0c81a6a..c9d5ad7 100644
--- a/tests/kms_key_test.rs
+++ b/tests/kms_key_test.rs
@@ -1,10 +1,21 @@
 mod kms_key {
     mod integration_tests {
+        use lazy_static::lazy_static;
+        use std::env;
         use std::{fs::File, io::Read};
 
         use evm_signer_kms::evm_account::kms_key::KmsKey;
 
-        const KMS_KEY_ID: &str = "52c9a19f-bcfd-46a7-bd56-6d0cf98d8616";
+        // Reads the KMS_KEY_ID environment variable using lazy static evaluation.
+        // Assumes no default value and fails if the key ID is not set!
+        const KMS_KEY_ID_VAR_NAME: &str = "KMS_KEY_ID";
+        lazy_static! {
+            static ref KMS_KEY_ID: String = env::var(KMS_KEY_ID_VAR_NAME).expect(
+                format!("⚠️ `{}` environment variable not set", KMS_KEY_ID_VAR_NAME).as_str()
+            );
+        }
+
+        const TEST_PUBLIC_KEY_DER_FILE: &str = "tests/data/pub-key.der";
         const DUMMY_KMS_KEY_ID: &str = "ffffffff-ffff-ffff-ffff-ffffffffffff";
         const DUMMY_MESSAGE_DIGEST: [u8; 32] = [
             0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
@@ -14,8 +25,8 @@ mod kms_key {
 
         #[tokio::test]
         async fn get_public_key_succeed() {
-            let kms_key = KmsKey::new(KMS_KEY_ID);
-            let mut public_key_file = File::open(format!("tests/data/{}.der", KMS_KEY_ID)).unwrap();
+            let kms_key = KmsKey::new(&KMS_KEY_ID);
+            let mut public_key_file = File::open(TEST_PUBLIC_KEY_DER_FILE).unwrap();
 
             let metadata_len = public_key_file.metadata().unwrap().len() as usize;
             let mut public_key_from_file = vec![0; metadata_len];
@@ -37,10 +48,12 @@ mod kms_key {
         // Just verifies if the signature process works
         #[tokio::test]
         async fn sign_succeed() {
-            let kms_key = KmsKey::new(KMS_KEY_ID);
+            let kms_key = KmsKey::new(&KMS_KEY_ID);
             let message = &DUMMY_MESSAGE_DIGEST.to_vec();
 
             kms_key.await.sign(message).await.unwrap();
+
+            assert!(true);
         }
     }
 }