diff --git a/src/cmd/go/testdata/script/mod_get_svn.txt b/src/cmd/go/testdata/script/mod_get_svn.txt
index cd19d99dbcc..1a5376dec0c 100644
--- a/src/cmd/go/testdata/script/mod_get_svn.txt
+++ b/src/cmd/go/testdata/script/mod_get_svn.txt
@@ -1,6 +1,19 @@
 [!net] skip
 [!exec:svn] skip
 
+# 'go get' will fall back to svn+ssh once svn fails over protocols like https.
+# If vcs-test.golang.org isn't in the user's known_hosts file, this will result
+# in an ssh prompt, which will stop 'go test' entirely
+#
+# Unfortunately, there isn't a way to globally disable host checking for ssh,
+# without modifying the real system's or user's configs. Changing $HOME won't
+# affect ssh either, as it ignores the environment variable entirely.
+#
+# However, a useful trick is pointing SVN_SSH to a program that doesn't exist,
+# resulting in svn skipping ssh entirely. Alternatives like
+# SVN_SSH="ssh -o StrictHostKeyChecking=no" didn't avoid the prompt.
+env SVN_SSH="svn_do_not_use_ssh"
+
 env GO111MODULE=on
 env GOPROXY=direct
 env GOSUMDB=off