diff --git a/src/fileops.c b/src/fileops.c
index 292673482..73939349d 100644
--- a/src/fileops.c
+++ b/src/fileops.c
@@ -131,7 +131,7 @@ int gitfo_isdir(const char *path)
 		return git__throw(GIT_ENOTFOUND, "%s does not exist", path);
 
 	if (!S_ISDIR(st.st_mode))
-		return git__throw(GIT_ENOTFOUND, "%s is not a file", path);
+		return git__throw(GIT_ENOTFOUND, "%s is a file", path);
 
 	return GIT_SUCCESS;
 }
diff --git a/tests/t10-refs.c b/tests/t10-refs.c
index ee006a8ce..4b34146ed 100644
--- a/tests/t10-refs.c
+++ b/tests/t10-refs.c
@@ -644,7 +644,7 @@ BEGIN_TEST(rename5, "can force-rename a reference with the name of an existing r
 	/* An existing reference... */
 	must_pass(git_reference_lookup(&looked_up_ref, repo, packed_head_name));
 
-	/* Can not be renamed to the name of another existing reference. */
+	/* Can be force-renamed to the name of another existing reference. */
 	must_pass(git_reference_rename_f(looked_up_ref, packed_test_head_name));
 
 	/* Check we actually renamed it */