diff --git a/tests/tslibfiles_age.c b/tests/tslibfiles_age.c
index 8e729828..89d9c6ff 100644
--- a/tests/tslibfiles_age.c
+++ b/tests/tslibfiles_age.c
@@ -55,8 +55,8 @@ mymain (void)
     {                                                    \
       test_data data = {                                 \
         .age = AGE,                                      \
-	.filemtime = FILEMTIME,                          \
-	.now = NOW,                                      \
+        .filemtime = FILEMTIME,                          \
+        .now = NOW,                                      \
         .expect_value = EXPECT_VALUE,                    \
       };                                                 \
       if (test_run("check function files_check_age",     \
diff --git a/tests/tslibfiles_size.c b/tests/tslibfiles_size.c
index d51ad5ee..a3ddb551 100644
--- a/tests/tslibfiles_size.c
+++ b/tests/tslibfiles_size.c
@@ -54,7 +54,7 @@ mymain (void)
     {                                                    \
       test_data data = {                                 \
         .size = SIZE,                                    \
-	.filesize = FILESIZE,                            \
+        .filesize = FILESIZE,                            \
         .expect_value = EXPECT_VALUE,                    \
       };                                                 \
       if (test_run("check function files_check_size",    \