diff --git a/java-api/src/main/java/br/com/tasknoteapp/java_api/controller/AuthenticationController.java b/java-api/src/main/java/br/com/tasknoteapp/java_api/controller/AuthenticationController.java
index 95bf1a0..a08165c 100644
--- a/java-api/src/main/java/br/com/tasknoteapp/java_api/controller/AuthenticationController.java
+++ b/java-api/src/main/java/br/com/tasknoteapp/java_api/controller/AuthenticationController.java
@@ -31,6 +31,34 @@ public class AuthenticationController {
 
   private final AuthService authService;
 
+  /**
+   * Signup a new user.
+   *
+   * @param loginRequest User data with email and password.
+   * @return JwtAuthenticationResponse containing user token
+   * @throws UserAlreadyExistsException
+   */
+  @PutMapping(path = "/signup", consumes = "application/json", produces = "application/json")
+  @Operation(
+      summary = "Signup a new user",
+      description = "Signup a new user given his email and password",
+      responses = {
+        @ApiResponse(responseCode = "201", description = "User successfully created and saved"),
+        @ApiResponse(
+            responseCode = "400",
+            description = "Wrong or missing information",
+            content = @Content(schema = @Schema(implementation = Void.class))),
+        @ApiResponse(
+            responseCode = "409",
+            description = "User already exists",
+            content = @Content(schema = @Schema(implementation = Void.class)))
+      })
+  public ResponseEntity<JwtAuthenticationResponse> signup(
+      @RequestBody @Valid LoginRequest loginRequest) {
+    String token = authService.create(loginRequest);
+    return ResponseEntity.status(HttpStatus.CREATED).body(new JwtAuthenticationResponse(token));
+  }
+
   /**
    * Authenticate a user given his email and password.
    *
@@ -60,33 +88,5 @@ public class AuthenticationController {
   public JwtAuthenticationResponse signin(@RequestBody @Valid LoginRequest loginRequest) {
     String token = authService.signin(loginRequest);
     return new JwtAuthenticationResponse(token);
-  }
-
-  /**
-   * Signup a new user.
-   *
-   * @param loginRequest User data with email and password.
-   * @return JwtAuthenticationResponse containing user token
-   * @throws UserAlreadyExistsException
-   */
-  @PutMapping(path = "/signup", consumes = "application/json", produces = "application/json")
-  @Operation(
-      summary = "Signup a new user",
-      description = "Signup a new user given his email and password",
-      responses = {
-        @ApiResponse(responseCode = "201", description = "User successfully created and saved"),
-        @ApiResponse(
-            responseCode = "400",
-            description = "Wrong or missing information",
-            content = @Content(schema = @Schema(implementation = Void.class))),
-        @ApiResponse(
-            responseCode = "409",
-            description = "User already exists",
-            content = @Content(schema = @Schema(implementation = Void.class)))
-      })
-  public ResponseEntity<JwtAuthenticationResponse> signup(
-      @RequestBody @Valid LoginRequest loginRequest) {
-    String token = authService.create(loginRequest);
-    return ResponseEntity.status(HttpStatus.CREATED).body(new JwtAuthenticationResponse(token));
-  }
+  }  
 }
diff --git a/java-api/src/test/java/br/com/tasknoteapp/java_api/controller/AuthenticationControllerTest.java b/java-api/src/test/java/br/com/tasknoteapp/java_api/controller/AuthenticationControllerTest.java
new file mode 100644
index 0000000..79a3b6d
--- /dev/null
+++ b/java-api/src/test/java/br/com/tasknoteapp/java_api/controller/AuthenticationControllerTest.java
@@ -0,0 +1,73 @@
+package br.com.tasknoteapp.java_api.controller;
+
+import static org.mockito.Mockito.when;
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.csrf;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import br.com.tasknoteapp.java_api.config.SecurityConfig;
+import br.com.tasknoteapp.java_api.repository.UserRepository;
+import br.com.tasknoteapp.java_api.request.LoginRequest;
+import br.com.tasknoteapp.java_api.service.AuthService;
+import br.com.tasknoteapp.java_api.service.JwtService;
+import br.com.tasknoteapp.java_api.service.UserService;
+import br.com.tasknoteapp.java_api.util.AuthUtil;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.http.MediaType;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.test.web.servlet.MockMvc;
+
+@WebMvcTest({AuthenticationController.class, SecurityConfig.class, UserDetailsService.class})
+class AuthenticationControllerTest {
+
+  @Autowired private MockMvc mockMvc;
+
+  @MockBean private AuthService authService;
+
+  @MockBean private UserService userService;
+
+  @MockBean private UserRepository userRepository;
+
+  @MockBean private PasswordEncoder passwordEncoder;
+
+  @MockBean private JwtService jwtService;
+
+  @MockBean private AuthenticationManager authenticationManager;
+
+  @MockBean private AuthUtil authUtil;
+
+  @Test
+  @DisplayName("Signup happy path should succeed")
+  void signup_happyPath_shouldSucceed() throws Exception {
+    LoginRequest request = new LoginRequest("user@domain.com", "abcde123456");
+    final String token = "xaxbxcxdx1x2x3";
+
+    when(authService.create(request)).thenReturn(token);
+
+    String jsonString =
+        """
+        {
+          "email": "user@domain.com",
+          "password": "abcde123456"
+        }
+        """;
+
+    mockMvc
+        .perform(
+            put("/auth/signup")
+                //.with(csrf().asHeader())
+                .header("Content-Type", MediaType.APPLICATION_JSON_VALUE)
+                //.accept(MediaType.APPLICATION_JSON)
+                .content(jsonString))
+        .andExpect(status().isCreated())
+        .andExpect(jsonPath("$.token").value(token))
+        .andReturn();
+  }
+}