diff --git a/tests/audiogen.c b/tests/audiogen.c
index 68ae135869..f96110e968 100644
--- a/tests/audiogen.c
+++ b/tests/audiogen.c
@@ -1,6 +1,6 @@
 /*
  * Generates a synthetic stereo sound
- * NOTE: no floats are used to guaranty a bit exact output.
+ * NOTE: No floats are used to guarantee a bit exact output.
  *
  * Copyright (c) 2002 Fabrice Bellard
  *
diff --git a/tests/videogen.c b/tests/videogen.c
index 39d85a26a6..226c4dd4f0 100644
--- a/tests/videogen.c
+++ b/tests/videogen.c
@@ -1,6 +1,6 @@
 /*
  * Generates a synthetic YUV video sequence suitable for codec testing.
- * NOTE: no floats are used to guaranty a bit exact output.
+ * NOTE: No floats are used to guarantee a bit exact output.
  *
  * Copyright (c) 2002 Fabrice Bellard
  *