diff --git a/src/main/java/cz/cvut/kbss/study/rest/PatientRecordController.java b/src/main/java/cz/cvut/kbss/study/rest/PatientRecordController.java
index d2f7d58f..0a51aae2 100644
--- a/src/main/java/cz/cvut/kbss/study/rest/PatientRecordController.java
+++ b/src/main/java/cz/cvut/kbss/study/rest/PatientRecordController.java
@@ -51,13 +51,17 @@ public class PatientRecordController extends BaseController {
     private final ExcelRecordConverter excelRecordConverter;
     private final RestTemplate restTemplate;
     private final ConfigReader configReader;
+    private ObjectMapper objectMapper;
 
-    public PatientRecordController(PatientRecordService recordService, ApplicationEventPublisher eventPublisher, ExcelRecordConverter excelRecordConverter, RestTemplate restTemplate, ConfigReader configReader) {
+    public PatientRecordController(PatientRecordService recordService, ApplicationEventPublisher eventPublisher,
+                                   ExcelRecordConverter excelRecordConverter, RestTemplate restTemplate,
+                                   ConfigReader configReader, ObjectMapper objectMapper)  {
         this.recordService = recordService;
         this.eventPublisher = eventPublisher;
         this.excelRecordConverter = excelRecordConverter;
         this.restTemplate = restTemplate;
         this.configReader = configReader;
+        this.objectMapper = objectMapper;
     }
 
     @PreAuthorize("hasRole('" + SecurityConstants.ROLE_ADMIN + "') or @securityUtils.isMemberOfInstitution(#institutionKey)")
@@ -167,7 +171,7 @@ public RecordImportResult importRecordsJson(@RequestPart("file") MultipartFile f
         if(file.isEmpty())
             throw new IllegalArgumentException("Cannot import records, missing input file");
         try {
-            records = new ObjectMapper().readValue(file.getBytes(), new TypeReference<List<PatientRecord>>(){});
+            records =  objectMapper.readValue(file.getBytes(), new TypeReference<List<PatientRecord>>(){});
         } catch (IOException e) {
             throw new RuntimeException("Failed to parse JSON content", e);
         }
diff --git a/src/main/java/cz/cvut/kbss/study/service/PatientRecordService.java b/src/main/java/cz/cvut/kbss/study/service/PatientRecordService.java
index 83eb8965..08c7a98f 100644
--- a/src/main/java/cz/cvut/kbss/study/service/PatientRecordService.java
+++ b/src/main/java/cz/cvut/kbss/study/service/PatientRecordService.java
@@ -72,6 +72,7 @@ public interface PatientRecordService extends BaseService<PatientRecord> {
      * current user is set as the record's author.
      *
      * @param records Records to import
+     * @param targetPhase Phase to be set to all imported records.
      * @return Instance representing the import result
      * @throws cz.cvut.kbss.study.exception.RecordAuthorNotFoundException Thrown when importing a record whose author
      *                                                                    does not exist in this application instance's
diff --git a/src/test/java/cz/cvut/kbss/study/rest/PatientRecordControllerTest.java b/src/test/java/cz/cvut/kbss/study/rest/PatientRecordControllerTest.java
index 7fca2a90..61a6537c 100644
--- a/src/test/java/cz/cvut/kbss/study/rest/PatientRecordControllerTest.java
+++ b/src/test/java/cz/cvut/kbss/study/rest/PatientRecordControllerTest.java
@@ -24,6 +24,7 @@
 import org.mockito.ArgumentCaptor;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
+import org.mockito.Spy;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.data.domain.Page;
@@ -65,6 +66,9 @@ public class PatientRecordControllerTest extends BaseControllerTestRunner {
     @Mock
     private ApplicationEventPublisher eventPublisherMock;
 
+    @Spy
+    private ObjectMapper objectMapper = Environment.getObjectMapper();
+
     @InjectMocks
     private PatientRecordController controller;
 
@@ -365,8 +369,16 @@ void importRecordsJsonImportsSpecifiedRecordsWithSpecifiedPhaseAndReturnsImportR
         final RecordPhase targetPhase = RecordPhase.values()[Generator.randomInt(0, RecordPhase.values().length)];
         when(patientRecordServiceMock.importRecords(anyList(), any(RecordPhase.class))).thenReturn(importResult);
 
-        mockMvc.perform(post("/records/import/json").content(toJson(records)).contentType(MediaType.MULTIPART_FORM_DATA_VALUE)
-                                               .param("phase", targetPhase.getIri())).andExpect(status().isOk());
+        MockMultipartFile file = new MockMultipartFile("file", "records.json",
+            MediaType.MULTIPART_FORM_DATA_VALUE, toJson(records).getBytes());
+
+        mockMvc.perform(
+            multipart("/records/import/json")
+                .file(file)
+                .contentType(MediaType.MULTIPART_FORM_DATA_VALUE)
+                .param("phase", targetPhase.getIri())
+        ).andExpect(status().isOk());
+
         verify(patientRecordServiceMock).importRecords(anyList(), eq(targetPhase));
     }