.../rest/tests/src/Functional/FileUploadResourceTestBase.php   | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php b/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php
index cb3ef3e..8dad10b 100644
--- a/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/FileUploadResourceTestBase.php
@@ -255,26 +255,26 @@ public function testPostFileUploadInvalidHeaders() {
 
     // An empty Content-Disposition header should return a 400.
     $response = $this->fileRequest($uri, $this->testFileData, ['Content-Disposition' => FALSE]);
-    $this->assertResourceErrorResponse(400, '"Content-Disposition" header is required. A file name in the format "filename=FILENAME" must be provided', $response);
+    $this->assertResourceErrorResponse(400, '"Content-Disposition" header is required. A file name in the format "filename=FILENAME" must be provided.', $response);
 
     // An empty filename with a context in the Content-Disposition header should
     // return a 400.
     $response = $this->fileRequest($uri, $this->testFileData, ['Content-Disposition' => 'file; filename=""']);
-    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
+    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided.', $response);
 
     // An empty filename without a context in the Content-Disposition header
     // should return a 400.
     $response = $this->fileRequest($uri, $this->testFileData, ['Content-Disposition' => 'filename=""']);
-    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
+    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided.', $response);
 
     // An invalid key-value pair in the Content-Disposition header should return
     // a 400.
     $response = $this->fileRequest($uri, $this->testFileData, ['Content-Disposition' => 'not_a_filename="example.txt"']);
-    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided', $response);
+    $this->assertResourceErrorResponse(400, 'No filename found in "Content-Disposition" header. A file name in the format "filename=FILENAME" must be provided.', $response);
 
     // Using filename* extended format is not currently supported.
     $response = $this->fileRequest($uri, $this->testFileData, ['Content-Disposition' => 'filename*="UTF-8 \' \' example.txt"']);
-    $this->assertResourceErrorResponse(400, 'The extended "filename*" format is currently not supported in the "Content-Disposition" header', $response);
+    $this->assertResourceErrorResponse(400, 'The extended "filename*" format is currently not supported in the "Content-Disposition" header.', $response);
   }
 
   /**