diff --git a/tests/libtest/lib695.c b/tests/libtest/lib695.c
index 1d8fa42e54..48541eaad0 100644
--- a/tests/libtest/lib695.c
+++ b/tests/libtest/lib695.c
@@ -80,7 +80,7 @@ static CURLcode test_lib695(const char *URL)
     result = curl_mime_subparts(part, mime1);
 
     if(result != CURLE_OK)
-      curl_mfprintf(stderr, "curl_mime_subparts() failed: %sn",
+      curl_mfprintf(stderr, "curl_mime_subparts() failed: %s\n",
                     curl_easy_strerror(result));
     else {
       mime1 = NULL;
diff --git a/tests/libtest/lib757.c b/tests/libtest/lib757.c
index c9dd3200af..6c9f432794 100644
--- a/tests/libtest/lib757.c
+++ b/tests/libtest/lib757.c
@@ -101,7 +101,7 @@ static CURLcode test_lib757(const char *URL)
     result = curl_mime_subparts(part, mime1);
 
     if(result != CURLE_OK)
-      curl_mfprintf(stderr, "curl_mime_subparts() failed: %sn",
+      curl_mfprintf(stderr, "curl_mime_subparts() failed: %s\n",
                     curl_easy_strerror(result));
     else {
       mime1 = NULL;