diff --git a/cio/io_test.go b/cio/io_test.go
index 6bb425b5c..40e5cc071 100644
--- a/cio/io_test.go
+++ b/cio/io_test.go
@@ -44,7 +44,7 @@ func TestNewFIFOSetInDir(t *testing.T) {
 	assert.Check(t, is.Equal("theid-stdin", filepath.Base(fifos.Stdin)))
 	assert.Check(t, is.Equal("theid-stdout", filepath.Base(fifos.Stdout)))
 	assert.Check(t, is.Equal("theid-stderr", filepath.Base(fifos.Stderr)))
-	assert.Check(t, is.Equal(true, fifos.Terminal))
+	assert.Check(t, fifos.Terminal)
 
 	files, err := ioutil.ReadDir(root)
 	assert.NilError(t, err)
@@ -89,11 +89,11 @@ func TestNewAttach(t *testing.T) {
 
 	io.Wait()
 	io.Cancel()
-	assert.Check(t, is.NilError(io.Close()))
+	assert.NilError(t, io.Close())
 
-	assert.Check(t, is.Equal(expectedStdout, stdout.String()))
-	assert.Check(t, is.Equal(expectedStderr, stderr.String()))
-	assert.Check(t, is.Equal(expectedStdin, string(actualStdin)))
+	assert.Check(t, is.EqualMultiLine(expectedStdout, stdout.String()))
+	assert.Check(t, is.EqualMultiLine(expectedStderr, stderr.String()))
+	assert.Check(t, is.EqualMultiLine(expectedStdin, string(actualStdin)))
 }
 
 type producers struct {
diff --git a/content/helpers_test.go b/content/helpers_test.go
index f93860cd9..239eb9dc1 100644
--- a/content/helpers_test.go
+++ b/content/helpers_test.go
@@ -3,6 +3,7 @@ package content
 import (
 	"bytes"
 	"context"
+	_ "crypto/sha256" // required by go-digest
 	"io"
 	"strings"
 	"testing"
diff --git a/log/context_test.go b/log/context_test.go
index 2c3712233..762afa561 100644
--- a/log/context_test.go
+++ b/log/context_test.go
@@ -5,15 +5,14 @@ import (
 	"testing"
 
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
 
 func TestLoggerContext(t *testing.T) {
 	ctx := context.Background()
-	assert.Check(t, is.DeepEqual(GetLogger(ctx), L))      // should be same as L variable
-	assert.Check(t, is.DeepEqual(G(ctx), GetLogger(ctx))) // these should be the same.
+	assert.Equal(t, GetLogger(ctx), L)      // should be same as L variable
+	assert.Equal(t, G(ctx), GetLogger(ctx)) // these should be the same.
 
 	ctx = WithLogger(ctx, G(ctx).WithField("test", "one"))
-	assert.Check(t, is.DeepEqual(GetLogger(ctx).Data["test"], "one"))
-	assert.Check(t, is.DeepEqual(G(ctx), GetLogger(ctx))) // these should be the same.
+	assert.Equal(t, GetLogger(ctx).Data["test"], "one")
+	assert.Equal(t, G(ctx), GetLogger(ctx)) // these should be the same.
 }
diff --git a/snapshots/testsuite/testsuite.go b/snapshots/testsuite/testsuite.go
index 75eedb202..698c9c3fb 100644
--- a/snapshots/testsuite/testsuite.go
+++ b/snapshots/testsuite/testsuite.go
@@ -422,7 +422,6 @@ func checkSnapshotterPrepareView(ctx context.Context, t *testing.T, snapshotter
 	}
 
 	_, err = snapshotter.View(ctx, newLayer, snapA, opt)
-	//must be err != nil
 	assert.Check(t, err != nil)
 
 	// Two Prepare with same key
@@ -437,7 +436,6 @@ func checkSnapshotterPrepareView(ctx context.Context, t *testing.T, snapshotter
 	}
 
 	_, err = snapshotter.Prepare(ctx, prepLayer, snapA, opt)
-	//must be err != nil
 	assert.Check(t, err != nil)
 
 	// Two View with same key
@@ -452,7 +450,6 @@ func checkSnapshotterPrepareView(ctx context.Context, t *testing.T, snapshotter
 	}
 
 	_, err = snapshotter.View(ctx, viewLayer, snapA, opt)
-	//must be err != nil
 	assert.Check(t, err != nil)
 
 }
diff --git a/testutil/helpers_unix.go b/testutil/helpers_unix.go
index 3cf1bb820..cc8eac023 100644
--- a/testutil/helpers_unix.go
+++ b/testutil/helpers_unix.go
@@ -9,15 +9,13 @@ import (
 
 	"github.com/containerd/containerd/mount"
 	"github.com/gotestyourself/gotestyourself/assert"
-	is "github.com/gotestyourself/gotestyourself/assert/cmp"
 )
 
 // Unmount unmounts a given mountPoint and sets t.Error if it fails
 func Unmount(t *testing.T, mountPoint string) {
 	t.Log("unmount", mountPoint)
-	if err := mount.UnmountAll(mountPoint, umountflags); err != nil {
-		t.Error("Could not umount", mountPoint, err)
-	}
+	err := mount.UnmountAll(mountPoint, umountflags)
+	assert.NilError(t, err)
 }
 
 // RequiresRoot skips tests that require root, unless the test.root flag has
@@ -25,9 +23,8 @@ func Unmount(t *testing.T, mountPoint string) {
 func RequiresRoot(t testing.TB) {
 	if !rootEnabled {
 		t.Skip("skipping test that requires root")
-		return
 	}
-	assert.Check(t, is.Equal(0, os.Getuid()), "This test must be run as root.")
+	assert.Equal(t, 0, os.Getuid(), "This test must be run as root.")
 }
 
 // RequiresRootM is similar to RequiresRoot but intended to be called from *testing.M.