diff --git a/ballerina/tests/jwt_issuer_test.bal b/ballerina/tests/jwt_issuer_test.bal
index f3719c48..e08365ef 100644
--- a/ballerina/tests/jwt_issuer_test.bal
+++ b/ballerina/tests/jwt_issuer_test.bal
@@ -18,6 +18,8 @@
 
 import ballerina/lang.'string;
 import ballerina/test;
+import ballerina/crypto;
+import ballerina/io;
 
 @test:Config {}
 isolated function testIssueJwtWithAllFields() returns Error? {
@@ -365,6 +367,44 @@ isolated function testIssueJwtWithEncryptedPrivateKey() returns Error? {
     assertDecodedJwt(result, expectedHeader, expectedPayload);
 }
 
+@test:Config {}
+isolated function testIssueJwtWithCryptoPrivateKey() returns io:Error|crypto:Error|Error? {
+    byte[] privateKeyContent = check io:fileReadBytes(PRIVATE_KEY_PATH);
+    crypto:PrivateKey privateKey = check crypto:decodeRsaPrivateKeyFromContent(privateKeyContent);
+    IssuerConfig issuerConfig = {
+        username: "John",
+        issuer: "wso2",
+        audience: ["ballerina", "ballerinaSamples"],
+        expTime: 600,
+        signatureConfig: {
+            config: privateKey
+        }
+    };
+    string result = check issue(issuerConfig);
+    string expectedHeader = "{\"alg\":\"RS256\", \"typ\":\"JWT\"}";
+    string expectedPayload = "{\"iss\":\"wso2\", \"sub\":\"John\", \"aud\":[\"ballerina\", \"ballerinaSamples\"]";
+    assertDecodedJwt(result, expectedHeader, expectedPayload);
+}
+
+@test:Config {}
+isolated function testIssueJwtWithEncryptedCryptoPrivateKey() returns io:Error|crypto:Error|Error? {
+    byte[] privateKeyContent = check io:fileReadBytes(ENCRYPTED_PRIVATE_KEY_PATH);
+    crypto:PrivateKey encryptedPrivateKey = check crypto:decodeRsaPrivateKeyFromContent(privateKeyContent, "ballerina");
+    IssuerConfig issuerConfig = {
+        username: "John",
+        issuer: "wso2",
+        audience: ["ballerina", "ballerinaSamples"],
+        expTime: 600,
+        signatureConfig: {
+            config: encryptedPrivateKey
+        }
+    };
+    string result = check issue(issuerConfig);
+    string expectedHeader = "{\"alg\":\"RS256\", \"typ\":\"JWT\"}";
+    string expectedPayload = "{\"iss\":\"wso2\", \"sub\":\"John\", \"aud\":[\"ballerina\", \"ballerinaSamples\"]";
+    assertDecodedJwt(result, expectedHeader, expectedPayload);
+}
+
 isolated function assertDecodedJwt(string jwt, string header, string payload) {
     string[] parts = re `\.`.split(jwt);
     // check header