diff --git a/tests/frame-stats.h b/tests/frame-stats.h
index 9c046a7f97..4a773021a1 100644
--- a/tests/frame-stats.h
+++ b/tests/frame-stats.h
@@ -1,9 +1,6 @@
-#ifndef __FRAME_STATS_H__
-#define __FRAME_STATS_H__
+#pragma once
 
 #include <gtk/gtk.h>
 
 void frame_stats_add_options (GOptionGroup *group);
 void frame_stats_ensure      (GtkWindow    *window);
-
-#endif /* __FRAME_STATS_H__ */
diff --git a/tests/gtkgears.h b/tests/gtkgears.h
index 0109723c14..5ebfa535ca 100644
--- a/tests/gtkgears.h
+++ b/tests/gtkgears.h
@@ -1,5 +1,4 @@
-#ifndef __GTK_GEARS_H__
-#define __GTK_GEARS_H__
+#pragma once
 
 #include <gtk/gtk.h>
 
@@ -44,5 +43,3 @@ void       gtk_gears_set_fps_label (GtkGears *gears,
 
 
 G_END_DECLS
-
-#endif /* __GTK_GEARS_H__ */
diff --git a/tests/testprintfileoperation.h b/tests/testprintfileoperation.h
index 40472fdf94..83e0f5eeee 100644
--- a/tests/testprintfileoperation.h
+++ b/tests/testprintfileoperation.h
@@ -1,5 +1,4 @@
-#ifndef __TEST_PRINT_FILE_OPERATION_H__
-#define __TEST_PRINT_FILE_OPERATION_H__
+#pragma once
 
 #include <gtk/gtk.h>
 
@@ -22,7 +21,6 @@ struct _TestPrintFileOperation
   double font_size;
   int lines_per_page;
 
-  
   char **lines;
   int num_lines;
   int num_pages;
@@ -36,8 +34,6 @@ struct _TestPrintFileOperationClass
 GType                   test_print_file_operation_get_type      (void);
 TestPrintFileOperation *test_print_file_operation_new           (const char             *filename);
 void                    test_print_file_operation_set_font_size (TestPrintFileOperation *op,
-								 double                  points);
+                                                                 double                  points);
 
 G_END_DECLS
-
-#endif /* __TEST_PRINT_FILE_OPERATION_H__ */
diff --git a/tests/variable.h b/tests/variable.h
index cc73022992..0cb4e04b69 100644
--- a/tests/variable.h
+++ b/tests/variable.h
@@ -1,5 +1,4 @@
-#ifndef __VARIABLE_H__
-#define __VARIABLE_H__
+#pragma once
 
 typedef struct
 {
@@ -19,6 +18,3 @@ void   variable_add                (Variable *variable,
 double variable_mean               (Variable *variable);
 double variable_standard_deviation (Variable *variable);
 void   variable_reset              (Variable *variable);
-
-#endif /* __VARIABLE_H__ */
-