diff --git a/simples3.go b/simples3.go
index 479f242..77ac5ea 100644
--- a/simples3.go
+++ b/simples3.go
@@ -309,6 +309,7 @@ func (s3 *S3) signRequest(req *http.Request) error {
 		}
 	}
 	req.Header.Set("Date", t.Format(amzDateISO8601TimeFormat))
+	req.Header.Set("X-Amz-Date", t.Format(amzDateISO8601TimeFormat))
 
 	// The x-amz-content-sha256 header is required for all AWS
 	// Signature Version 4 requests. It provides a hash of the
diff --git a/simples3_test.go b/simples3_test.go
index 15e73d8..70d34f8 100644
--- a/simples3_test.go
+++ b/simples3_test.go
@@ -155,7 +155,7 @@ func TestS3_FileUploadPostAndPut(t *testing.T) {
 				})
 
 				if (err != nil) != tt.wantErr {
-					t.Errorf("S3.FileUpload() error = %v, wantErr %v", err, tt.wantErr)
+					t.Errorf("S3.FileDetails() error = %v, wantErr %v", err, tt.wantErr)
 				}
 
 				if len(dResp.AmzMeta) != len(tt.args.u.CustomMetadata) {