diff --git a/src/cmd/go/testdata/script/modfile_flag.txt b/src/cmd/go/testdata/script/modfile_flag.txt
index 0ad08808178..5852c311891 100644
--- a/src/cmd/go/testdata/script/modfile_flag.txt
+++ b/src/cmd/go/testdata/script/modfile_flag.txt
@@ -73,7 +73,7 @@ cmp go.mod go.mod.orig
 cmp go.sum go.sum.orig
 
 
-# If the altnernate mod file does not have a ".mod" suffix, an error
+# If the alternate mod file does not have a ".mod" suffix, an error
 # should be reported.
 cp go.alt.mod goaltmod
 ! go mod tidy -modfile=goaltmod