diff --git a/cmd/testbot/main.go b/cmd/testbot/main.go
index 8558d96..e4692b5 100644
--- a/cmd/testbot/main.go
+++ b/cmd/testbot/main.go
@@ -40,7 +40,7 @@ const usageString = `usage:
   testbot onejob [sha] [dir] [name]
 
 For onejob, sha is a git commit hash, dir is the location
-of a Testfile relative to $I10R, and name is the name
+of a Testfile relative to $POGO, and name is the name
 of an entry in the Testfile.
 
 Example:
diff --git a/worker/main.go b/worker/main.go
index bf0dff1..e381e57 100644
--- a/worker/main.go
+++ b/worker/main.go
@@ -324,7 +324,7 @@ func startJob(job testbot.Job) func() {
 		f.Seek(0, 0)
 		if s := scanError(f); s != "" && status != "success" {
 			s = strings.Replace(s, cmddir+"/", "", -1)
-			s = strings.Replace(s, repoDir+"/", "$I10R/", -1)
+			s = strings.Replace(s, repoDir+"/", "$POGO/", -1)
 			desc += ": " + s
 		}
 		f.Seek(0, 0)
@@ -411,8 +411,7 @@ func startJobProc(ctx context.Context, w io.Writer, job testbot.Job) (*exec.Cmd,
 func prepareCommand(ctx context.Context, dir string, w io.Writer, cmd string) *exec.Cmd {
 	c := command(ctx, w, "/bin/bash", "-eo", "pipefail", "-c", cmd)
 	c.Env = append(os.Environ(),
-		"CHAIN="+repoDir,
-		"I10R="+repoDir,
+		"POGO="+repoDir,
 		"GOBIN="+binDir,
 		"NETLIFY_AUTH_TOKEN="+netlify,
 		"PATH="+binDir+":"+repoDir+"/bin:"+os.Getenv("PATH"),