diff --git a/pkg/handlers/list_files_test.go b/pkg/handlers/list_files_test.go
index 85076f8b..b35a8731 100644
--- a/pkg/handlers/list_files_test.go
+++ b/pkg/handlers/list_files_test.go
@@ -36,7 +36,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 				}, nil
 			},
 			wantStatusCode: http.StatusOK,
-			wantBody:       `[{"path":"file1.txt"},{"path":"file2.txt"}]`,
+			wantBody:       "[{\"path\":\"file1.txt\"},{\"path\":\"file2.txt\"}]\n",
 		},
 		{
 			name:   "successful listing as text",
@@ -61,7 +61,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 				}, nil
 			},
 			wantStatusCode: http.StatusOK,
-			wantBody:       `[{"path":"file1.txt"},{"path":"file2.txt"}]`,
+			wantBody:       "[{\"path\":\"file1.txt\"},{\"path\":\"file2.txt\"}]\n",
 		},
 		{
 			name:   "successful listing with filtering",
@@ -85,7 +85,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 				}, nil
 			},
 			wantStatusCode: http.StatusOK,
-			wantBody:       `[{"path":"file2.txt"},{"path":"file2.json"}]`,
+			wantBody:       "[{\"path\":\"file2.txt\"},{\"path\":\"file2.json\"}]\n",
 		},
 		{
 			name:   "project not found",
@@ -94,7 +94,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 				return nil, project.NewProjectNotFoundError(projectId)
 			},
 			wantStatusCode: http.StatusNotFound,
-			wantBody:       "project 123 not found",
+			wantBody:       "project 123 not found\n",
 		},
 		{
 			name:   "internal server error",
@@ -103,7 +103,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 				return nil, errors.New("internal error")
 			},
 			wantStatusCode: http.StatusInternalServerError,
-			wantBody:       "Failed to list files: internal error",
+			wantBody:       "Failed to list files: internal error\n",
 		},
 	}
 
@@ -128,7 +128,7 @@ func TestListFilesHandler_ServeHTTP(t *testing.T) {
 			router.ServeHTTP(rr, req)
 
 			assert.Equal(t, tt.wantStatusCode, rr.Code)
-			assert.Contains(t, rr.Body.String(), tt.wantBody)
+			assert.Equal(t, tt.wantBody, rr.Body.String())
 		})
 	}
 }