diff --git a/src/test/java/org/folio/dcb/controller/EcsRequestTransactionsApiControllerTest.java b/src/test/java/org/folio/dcb/controller/EcsRequestTransactionsApiControllerTest.java
index a388bb4a..59b06608 100644
--- a/src/test/java/org/folio/dcb/controller/EcsRequestTransactionsApiControllerTest.java
+++ b/src/test/java/org/folio/dcb/controller/EcsRequestTransactionsApiControllerTest.java
@@ -58,4 +58,37 @@ void createEcsRequestTransactionsShouldLogErrorToAuditAndRethrowWhenServiceFails
     verify(transactionAuditService).logErrorIfTransactionAuditNotExists(transactionId, dcbTransaction, errorMessage);
     verify(ecsRequestTransactionsService).createEcsRequestTransactions(transactionId, dcbTransaction);
   }
+
+  @Test
+  void updateEcsRequestTransactionShouldReturnOkStatusWhenSuccessful() {
+    // TestMate-b3c9d28477affe116c99ccaaa62a5265
+    var txId = UUID.randomUUID().toString();
+    var dcbTransaction = lenderDcbTransaction();
+    var expectedResponse = new TransactionStatusResponse().status(TransactionStatusResponse.StatusEnum.OPEN);
+    when(ecsRequestTransactionsService.updateEcsRequestTransaction(txId, dcbTransaction))
+      .thenReturn(expectedResponse);
+
+    var actualResponse = ecsRequestTransactionsApiController.updateEcsRequestTransaction(txId, dcbTransaction);
+
+    assertThat(actualResponse.getStatusCode()).isEqualTo(HttpStatus.OK);
+    assertThat(actualResponse.getBody()).isEqualTo(expectedResponse);
+    verify(ecsRequestTransactionsService).updateEcsRequestTransaction(txId, dcbTransaction);
+  }
+
+  @Test
+  void updateEcsRequestTransactionShouldLogErrorToAuditAndRethrowWhenServiceFails() {
+    // TestMate-bc4856a5a28a7384fc616339818b9260
+    var txId = UUID.randomUUID().toString();
+    var dcbTransaction = lenderDcbTransaction();
+    var errorMessage = "Update failed";
+    when(ecsRequestTransactionsService.updateEcsRequestTransaction(txId, dcbTransaction))
+      .thenThrow(new RuntimeException(errorMessage));
+
+    assertThatThrownBy(() -> ecsRequestTransactionsApiController.updateEcsRequestTransaction(txId, dcbTransaction))
+      .isInstanceOf(RuntimeException.class)
+      .hasMessage(errorMessage);
+
+    verify(transactionAuditService).logErrorIfTransactionAuditNotExists(txId, dcbTransaction, errorMessage);
+    verify(ecsRequestTransactionsService).updateEcsRequestTransaction(txId, dcbTransaction);
+  }
 }
diff --git a/src/test/java/org/folio/dcb/controller/TransactionApiControllerTest.java b/src/test/java/org/folio/dcb/controller/TransactionApiControllerTest.java
index ba082b7b..0fefc16c 100644
--- a/src/test/java/org/folio/dcb/controller/TransactionApiControllerTest.java
+++ b/src/test/java/org/folio/dcb/controller/TransactionApiControllerTest.java
@@ -6,6 +6,7 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import java.util.UUID;
 import org.folio.dcb.domain.dto.TransactionStatusResponse;
 import org.folio.dcb.domain.dto.TransactionStatusResponse.StatusEnum;
 import org.folio.dcb.service.TransactionAuditService;
@@ -44,7 +45,7 @@ void createCirculationRequestTest() {
   @Test
   void createCirculationRequestShouldLogAuditAndThrowWhenExceptionOccurs() {
     // TestMate-515a8d0a1d8b2ffc0a8908e3322eb24e
-    var dcbTransactionId = "txn-err-1";
+    var dcbTransactionId = UUID.randomUUID().toString();
     var errorMessage = "Service Error";
     var dcbTransaction = lenderDcbTransaction();
     var exception = new RuntimeException(errorMessage);
@@ -54,8 +55,36 @@ void createCirculationRequestShouldLogAuditAndThrowWhenExceptionOccurs() {
       transactionApiController.createCirculationRequest(dcbTransactionId, dcbTransaction))
       .isInstanceOf(RuntimeException.class)
       .hasMessage(errorMessage);
-
     verify(transactionsService).createCirculationRequest(dcbTransactionId, dcbTransaction);
     verify(transactionAuditService).logErrorIfTransactionAuditNotExists(dcbTransactionId, dcbTransaction, errorMessage);
   }
+
+  @Test
+  void getTransactionStatusByIdTest() {
+    // TestMate-5265ce147e6303a6c6059ec4eb249b3a
+    var dcbTransactionId = UUID.randomUUID().toString();
+    var expectedResponse = new TransactionStatusResponse().status(StatusEnum.CREATED);
+    when(transactionsService.getTransactionStatusById(dcbTransactionId)).thenReturn(expectedResponse);
+
+    var responseEntity = transactionApiController.getTransactionStatusById(dcbTransactionId);
+
+    assertThat(responseEntity.getStatusCode()).isEqualTo(HttpStatus.OK);
+    assertThat(responseEntity.getBody()).isEqualTo(expectedResponse);
+    verify(transactionsService).getTransactionStatusById(dcbTransactionId);
+  }
+
+  @Test
+  void getTransactionStatusByIdShouldLogAuditAndThrowWhenExceptionOccurs() {
+    // TestMate-340f043d8cb1572c0d7d557ce271239c
+    var dcbTransactionId = UUID.randomUUID().toString();
+    var errorMessage = "Database connection failed";
+    var exception = new RuntimeException(errorMessage);
+    when(transactionsService.getTransactionStatusById(dcbTransactionId)).thenThrow(exception);
+
+    assertThatThrownBy(() -> transactionApiController.getTransactionStatusById(dcbTransactionId))
+      .isInstanceOf(RuntimeException.class)
+      .hasMessage(errorMessage);
+    verify(transactionsService).getTransactionStatusById(dcbTransactionId);
+    verify(transactionAuditService).logErrorIfTransactionAuditExists(dcbTransactionId, errorMessage);
+  }
 }