Fix typos
diff --git a/tests/data_files/dir-maxpath/Readme.txt b/tests/data_files/dir-maxpath/Readme.txt
index 8ce0433..cb7c5ef 100644
--- a/tests/data_files/dir-maxpath/Readme.txt
+++ b/tests/data_files/dir-maxpath/Readme.txt
@@ -1,4 +1,4 @@
-These certificates from a very long chain, used to test the
+These certificates form a very long chain, used to test the
 MBEDTLS_X509_MAX_INT_CA limit.
 
 NN.key is the private key of certificate NN.crt.