diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c5499e03..913a9728 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: [1.14.x, 1.15.x]
+        go-version: [1.14.x, 1.15.x, 1.16beta1]
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/cmd/testscript/testdata/simple.txt b/cmd/testscript/testdata/simple.txt
index 347569c6..4dfedec3 100644
--- a/cmd/testscript/testdata/simple.txt
+++ b/cmd/testscript/testdata/simple.txt
@@ -11,6 +11,7 @@ stdout 'example.com/mod'
 
 -- file.txt --
 >env GOMODCACHE=$WORK
+>go get -d fruit.com
 >go list -m
 >stdout 'example.com/mod'
 >go list fruit.com/...