diff --git a/node/config/def_test.go b/node/config/def_test.go
index d45bc6ec8f3..6b4546c5a6c 100644
--- a/node/config/def_test.go
+++ b/node/config/def_test.go
@@ -24,6 +24,7 @@ func TestDefaultFullNodeRoundtrip(t *testing.T) {
 		s = buf.String()
 	}
 
+	//stm: @NODE_CONFIG_003
 	c2, err := FromReader(strings.NewReader(s), DefaultFullNode())
 	require.NoError(t, err)
 
@@ -45,6 +46,7 @@ func TestDefaultMinerRoundtrip(t *testing.T) {
 		s = buf.String()
 	}
 
+	//stm: @NODE_CONFIG_004
 	c2, err := FromReader(strings.NewReader(s), DefaultStorageMiner())
 	require.NoError(t, err)
 
diff --git a/node/config/load_test.go b/node/config/load_test.go
index 9abe8a54b7b..c8e8aef194d 100644
--- a/node/config/load_test.go
+++ b/node/config/load_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package config
 
 import (
@@ -14,6 +15,7 @@ func TestDecodeNothing(t *testing.T) {
 	assert := assert.New(t)
 
 	{
+		//stm: @NODE_CONFIG_001
 		cfg, err := FromFile(os.DevNull, DefaultFullNode())
 		assert.Nil(err, "error should be nil")
 		assert.Equal(DefaultFullNode(), cfg,
@@ -21,6 +23,7 @@ func TestDecodeNothing(t *testing.T) {
 	}
 
 	{
+		//stm: @NODE_CONFIG_002
 		cfg, err := FromFile("./does-not-exist.toml", DefaultFullNode())
 		assert.Nil(err, "error should be nil")
 		assert.Equal(DefaultFullNode(), cfg,
diff --git a/node/impl/client/client_test.go b/node/impl/client/client_test.go
index 834c980ab14..642ae572a23 100644
--- a/node/impl/client/client_test.go
+++ b/node/impl/client/client_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package client
 
 import (
@@ -44,10 +45,12 @@ func TestImportLocal(t *testing.T) {
 	b, err := testdata.ReadFile("testdata/payload.txt")
 	require.NoError(t, err)
 
+	//stm: @CLIENT_IMPORT_003
 	root, err := a.ClientImportLocal(ctx, bytes.NewReader(b))
 	require.NoError(t, err)
 	require.NotEqual(t, cid.Undef, root)
 
+	//stm: @CLIENT_IMPORT_004
 	list, err := a.ClientListImports(ctx)
 	require.NoError(t, err)
 	require.Len(t, list, 1)
@@ -68,6 +71,7 @@ func TestImportLocal(t *testing.T) {
 	// retrieve as UnixFS.
 	out1 := filepath.Join(dir, "retrieval1.data") // as unixfs
 	out2 := filepath.Join(dir, "retrieval2.data") // as car
+	//stm: @CLIENT_IMPORT_005
 	err = a.ClientRetrieve(ctx, order, &api.FileRef{
 		Path: out1,
 	})
@@ -84,6 +88,7 @@ func TestImportLocal(t *testing.T) {
 	require.NoError(t, err)
 
 	// open the CARv2 being custodied by the import manager
+	//stm: @CLIENT_IMPORT_006
 	orig, err := carv2.OpenReader(it.CARPath)
 	require.NoError(t, err)
 
@@ -94,6 +99,7 @@ func TestImportLocal(t *testing.T) {
 	require.EqualValues(t, 1, exported.Version)
 	require.EqualValues(t, 2, orig.Version)
 
+	//stm: @CLIENT_IMPORT_007
 	origRoots, err := orig.Roots()
 	require.NoError(t, err)
 	require.Len(t, origRoots, 1)
diff --git a/node/impl/client/import_test.go b/node/impl/client/import_test.go
index adf6531d088..93041d22e8c 100644
--- a/node/impl/client/import_test.go
+++ b/node/impl/client/import_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package client
 
 import (
@@ -35,11 +36,13 @@ func TestRoundtripUnixFS_Dense(t *testing.T) {
 	defer os.Remove(carv2File) //nolint:errcheck
 
 	// import a file to a Unixfs DAG using a CARv2 read/write blockstore.
+	//stm: @CLIENT_IMPORT_001, @CLIENT_BLOCKSTORE_001
 	bs, err := blockstore.OpenReadWrite(carv2File, nil,
 		carv2.ZeroLengthSectionAsEOF(true),
 		blockstore.UseWholeCIDs(true))
 	require.NoError(t, err)
 
+	//stm: @CLIENT_IMPORT_001
 	root, err := buildUnixFS(ctx, bytes.NewBuffer(inputContents), bs, false)
 	require.NoError(t, err)
 	require.NotEqual(t, cid.Undef, root)
@@ -85,11 +88,13 @@ func TestRoundtripUnixFS_Filestore(t *testing.T) {
 	dst := newTmpFile(t)
 	defer os.Remove(dst) //nolint:errcheck
 
+	//stm: @CLIENT_FS_001
 	root, err := a.createUnixFSFilestore(ctx, inputPath, dst)
 	require.NoError(t, err)
 	require.NotEqual(t, cid.Undef, root)
 
 	// convert the CARv2 to a normal file again and ensure the contents match
+	//stm: @CLIENT_FS_002
 	fs, err := stores.ReadOnlyFilestore(dst)
 	require.NoError(t, err)
 	defer fs.Close() //nolint:errcheck
@@ -116,6 +121,7 @@ func TestRoundtripUnixFS_Filestore(t *testing.T) {
 }
 
 func newTmpFile(t *testing.T) string {
+	//stm: @CLIENT_FS_003
 	f, err := os.CreateTemp("", "")
 	require.NoError(t, err)
 	require.NoError(t, f.Close())
@@ -123,6 +129,7 @@ func newTmpFile(t *testing.T) string {
 }
 
 func genInputFile(t *testing.T) (filepath string, contents []byte) {
+	//stm: @CLIENT_FS_004
 	s := strings.Repeat("abcde", 100)
 	tmp, err := os.CreateTemp("", "")
 	require.NoError(t, err)
diff --git a/node/impl/full/gas_test.go b/node/impl/full/gas_test.go
index 028e039ce4f..854a2c4798d 100644
--- a/node/impl/full/gas_test.go
+++ b/node/impl/full/gas_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package full
 
 import (
@@ -12,6 +13,7 @@ import (
 )
 
 func TestMedian(t *testing.T) {
+	//stm: @REPO_GAS_001
 	require.Equal(t, types.NewInt(5), medianGasPremium([]GasMeta{
 		{big.NewInt(5), build.BlockGasTarget},
 	}, 1))
diff --git a/node/repo/fsrepo_test.go b/node/repo/fsrepo_test.go
index bd03cc084ea..dcf44778b9d 100644
--- a/node/repo/fsrepo_test.go
+++ b/node/repo/fsrepo_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package repo
 
 import (
@@ -12,11 +13,13 @@ func genFsRepo(t *testing.T) (*FsRepo, func()) {
 		t.Fatal(err)
 	}
 
+	//stm: @REPO_FS_001
 	repo, err := NewFS(path)
 	if err != nil {
 		t.Fatal(err)
 	}
 
+	//stm: @REPO_FS_002
 	err = repo.Init(FullNode)
 	if err != ErrRepoExists && err != nil {
 		t.Fatal(err)
@@ -29,5 +32,6 @@ func genFsRepo(t *testing.T) (*FsRepo, func()) {
 func TestFsBasic(t *testing.T) {
 	repo, closer := genFsRepo(t)
 	defer closer()
+	//stm: @REPO_FS_003
 	basicTest(t, repo)
 }
diff --git a/node/repo/memrepo_test.go b/node/repo/memrepo_test.go
index 965bc02c195..457a4b6d986 100644
--- a/node/repo/memrepo_test.go
+++ b/node/repo/memrepo_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package repo
 
 import (
@@ -6,5 +7,6 @@ import (
 
 func TestMemBasic(t *testing.T) {
 	repo := NewMemory(nil)
+	//stm: @REPO_MEM_001
 	basicTest(t, repo)
 }
diff --git a/node/repo/repo_test.go b/node/repo/repo_test.go
index 444fab267af..6c69b4cb3be 100644
--- a/node/repo/repo_test.go
+++ b/node/repo/repo_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package repo
 
 import (
@@ -14,17 +15,20 @@ import (
 )
 
 func basicTest(t *testing.T, repo Repo) {
+	//stm: @REPO_NET_001
 	apima, err := repo.APIEndpoint()
 	if assert.Error(t, err) {
 		assert.Equal(t, ErrNoAPIEndpoint, err)
 	}
 	assert.Nil(t, apima, "with no api endpoint, return should be nil")
 
+	//stm: @REPO_MUT_001
 	lrepo, err := repo.Lock(FullNode)
 	assert.NoError(t, err, "should be able to lock once")
 	assert.NotNil(t, lrepo, "locked repo shouldn't be nil")
 
 	{
+		//stm: @REPO_MUT_002
 		lrepo2, err := repo.Lock(FullNode)
 		if assert.Error(t, err) {
 			assert.Equal(t, ErrRepoAlreadyLocked, err)
@@ -32,6 +36,7 @@ func basicTest(t *testing.T, repo Repo) {
 		assert.Nil(t, lrepo2, "with locked repo errors, nil should be returned")
 	}
 
+	//stm: @REPO_MUT_003
 	err = lrepo.Close()
 	assert.NoError(t, err, "should be able to unlock")
 
@@ -42,6 +47,7 @@ func basicTest(t *testing.T, repo Repo) {
 	ma, err := multiaddr.NewMultiaddr("/ip4/127.0.0.1/tcp/43244")
 	assert.NoError(t, err, "creating multiaddr shouldn't error")
 
+	//stm: @REPO_NET_002
 	err = lrepo.SetAPIEndpoint(ma)
 	assert.NoError(t, err, "setting multiaddr shouldn't error")
 
@@ -69,6 +75,7 @@ func basicTest(t *testing.T, repo Repo) {
 	err = lrepo.Close()
 	assert.NoError(t, err, "should be able to close")
 
+	//stm: @REPO_NET_003
 	apima, err = repo.APIEndpoint()
 
 	if assert.Error(t, err) {
@@ -83,22 +90,27 @@ func basicTest(t *testing.T, repo Repo) {
 	assert.NoError(t, err, "should be able to relock")
 	assert.NotNil(t, lrepo, "locked repo shouldn't be nil")
 
+	//stm: @REPO_KEYSTR_001
 	kstr, err := lrepo.KeyStore()
 	assert.NoError(t, err, "should be able to get keystore")
 	assert.NotNil(t, lrepo, "keystore shouldn't be nil")
 
+	//stm: @REPO_KEYSTR_002
 	list, err := kstr.List()
 	assert.NoError(t, err, "should be able to list key")
 	assert.Empty(t, list, "there should be no keys")
 
+	//stm: @REPO_KEYSTR_003
 	err = kstr.Put("k1", k1)
 	assert.NoError(t, err, "should be able to put k1")
 
+	//stm: @REPO_KEYSTR_004
 	err = kstr.Put("k1", k1)
 	if assert.Error(t, err, "putting key under the same name should error") {
 		assert.True(t, xerrors.Is(err, types.ErrKeyExists), "returned error is ErrKeyExists")
 	}
 
+	//stm: @REPO_KEYSTR_005
 	k1prim, err := kstr.Get("k1")
 	assert.NoError(t, err, "should be able to get k1")
 	assert.Equal(t, k1, k1prim, "returned key should be the same")
@@ -116,6 +128,7 @@ func basicTest(t *testing.T, repo Repo) {
 	assert.NoError(t, err, "should be able to list keys")
 	assert.ElementsMatch(t, []string{"k1", "k2"}, list, "returned elements match")
 
+	//stm: @REPO_KEYSTR_006
 	err = kstr.Delete("k2")
 	assert.NoError(t, err, "should be able to delete key")
 
diff --git a/node/shutdown_test.go b/node/shutdown_test.go
index 15e2af93e5e..58c79a34e53 100644
--- a/node/shutdown_test.go
+++ b/node/shutdown_test.go
@@ -15,6 +15,7 @@ func TestMonitorShutdown(t *testing.T) {
 	// Three shutdown handlers.
 	var wg sync.WaitGroup
 	wg.Add(3)
+	//stm: @NODE_SHUTDOWN_001
 	h := ShutdownHandler{
 		Component: "handler",
 		StopFunc: func(_ context.Context) error {
@@ -23,6 +24,7 @@ func TestMonitorShutdown(t *testing.T) {
 		},
 	}
 
+	//stm: @NODE_SHUTDOWN_002
 	finishCh := MonitorShutdown(signalCh, h, h, h)
 
 	// Nothing here after 10ms.
diff --git a/paychmgr/paych_test.go b/paychmgr/paych_test.go
index ab04ad7e0ea..1edb840cc5e 100644
--- a/paychmgr/paych_test.go
+++ b/paychmgr/paych_test.go
@@ -1,3 +1,4 @@
+//stm: #unit
 package paychmgr
 
 import (
@@ -196,6 +197,7 @@ func TestCheckVoucherValid(t *testing.T) {
 
 	for _, tcase := range tcases {
 		tcase := tcase
+		//stm: @PAYMENT_CHANNEL_VOUCHER_001, PAYMENT_CHANNEL_VOUCHER_002, PAYMENT_CHANNEL_VOUCHER_003, PAYMENT_CHANNEL_VOUCHER_004
 		t.Run(tcase.name, func(t *testing.T) {
 			// Create an actor for the channel with the test case balance
 			act := &types.Actor{