diff --git a/pkg/cmd/roachprod/ssh/BUILD.bazel b/pkg/cmd/roachprod/ssh/BUILD.bazel
index 72504464df19..937134bf678c 100644
--- a/pkg/cmd/roachprod/ssh/BUILD.bazel
+++ b/pkg/cmd/roachprod/ssh/BUILD.bazel
@@ -1,11 +1,17 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "ssh",
     srcs = [
+        "io.go",
         "shell.go",
-        "ssh.go",
     ],
     importpath = "github.com/cockroachdb/cockroach/pkg/cmd/roachprod/ssh",
     visibility = ["//visibility:public"],
 )
+
+go_test(
+    name = "ssh_test",
+    srcs = ["io_test.go"],
+    embed = [":ssh"],
+)
diff --git a/pkg/cmd/roachprod/ssh/ssh.go b/pkg/cmd/roachprod/ssh/io.go
similarity index 100%
rename from pkg/cmd/roachprod/ssh/ssh.go
rename to pkg/cmd/roachprod/ssh/io.go
diff --git a/pkg/cmd/roachprod/ssh/io_test.go b/pkg/cmd/roachprod/ssh/io_test.go
new file mode 100644
index 000000000000..c863aa6e25e5
--- /dev/null
+++ b/pkg/cmd/roachprod/ssh/io_test.go
@@ -0,0 +1,49 @@
+// Copyright 2018 The Cockroach Authors.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+package ssh
+
+import (
+	"io/ioutil"
+	"testing"
+)
+
+func TestProgress(t *testing.T) {
+	output, err := ioutil.TempFile("", "example*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer output.Close()
+
+	b := make([]byte, 10)
+	var percent float64
+	writer := &ProgressWriter{
+		Writer: output,
+		Done:   0,
+		Total:  50,
+		Progress: func(currentProgress float64) {
+			percent = currentProgress
+		},
+	}
+	for i := 0; i < 4; i++ {
+		if _, err := writer.Write(b); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if percent != 0.8 {
+		t.Errorf("expected progress of 80%% but got %.2f", percent*100)
+	}
+	if _, err := writer.Write(b); err != nil {
+		t.Fatal(err)
+	}
+	if percent != 1.0 {
+		t.Errorf("expected progress of 100%% but got %.2f", percent*100)
+	}
+}