diff --git a/metropolis/test/e2e/httpserver/main.go b/metropolis/test/e2e/httpserver/main.go
index 3b593db..be83934 100644
--- a/metropolis/test/e2e/httpserver/main.go
+++ b/metropolis/test/e2e/httpserver/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // httpserver serves a test HTTP endpoint for E2E testing.
 package main
 
diff --git a/metropolis/test/e2e/k8s_cts/main.go b/metropolis/test/e2e/k8s_cts/main.go
index b9818b3..de0bbcc 100644
--- a/metropolis/test/e2e/k8s_cts/main.go
+++ b/metropolis/test/e2e/k8s_cts/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // This package launches a Metropolis cluster with two nodes and spawns in the
 // CTS container. Then it streams its output to the console. When the CTS has
diff --git a/metropolis/test/e2e/persistentvolume/main.go b/metropolis/test/e2e/persistentvolume/main.go
index d9ff958..c80700a 100644
--- a/metropolis/test/e2e/persistentvolume/main.go
+++ b/metropolis/test/e2e/persistentvolume/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // This is a test for PersistentVolumes provided by our provisioner. It tests
 // that volumes have the right mount flags, and the expected quotas.
 //
diff --git a/metropolis/test/e2e/preseedtest/main.go b/metropolis/test/e2e/preseedtest/main.go
index 77fcba6..baeb1e5 100644
--- a/metropolis/test/e2e/preseedtest/main.go
+++ b/metropolis/test/e2e/preseedtest/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/test/e2e/selftest/main.go b/metropolis/test/e2e/selftest/main.go
index 2603eae..3b31c5b 100644
--- a/metropolis/test/e2e/selftest/main.go
+++ b/metropolis/test/e2e/selftest/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/test/e2e/suites/core/run_test.go b/metropolis/test/e2e/suites/core/run_test.go
index 7a07b1e..692969d 100644
--- a/metropolis/test/e2e/suites/core/run_test.go
+++ b/metropolis/test/e2e/suites/core/run_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package test_core
 
 import (
diff --git a/metropolis/test/e2e/suites/ha/run_test.go b/metropolis/test/e2e/suites/ha/run_test.go
index f2f7cc2..b56e40c 100644
--- a/metropolis/test/e2e/suites/ha/run_test.go
+++ b/metropolis/test/e2e/suites/ha/run_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package ha
 
 import (
diff --git a/metropolis/test/e2e/suites/ha_cold/run_test.go b/metropolis/test/e2e/suites/ha_cold/run_test.go
index ae6a043..0684a0b 100644
--- a/metropolis/test/e2e/suites/ha_cold/run_test.go
+++ b/metropolis/test/e2e/suites/ha_cold/run_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package ha_cold
 
 import (
diff --git a/metropolis/test/e2e/suites/kubernetes/kubernetes_helpers.go b/metropolis/test/e2e/suites/kubernetes/kubernetes_helpers.go
index c8e04bf..1f45fab 100644
--- a/metropolis/test/e2e/suites/kubernetes/kubernetes_helpers.go
+++ b/metropolis/test/e2e/suites/kubernetes/kubernetes_helpers.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package kubernetes
 
diff --git a/metropolis/test/e2e/suites/kubernetes/run_test.go b/metropolis/test/e2e/suites/kubernetes/run_test.go
index 0c116f6..0acc473 100644
--- a/metropolis/test/e2e/suites/kubernetes/run_test.go
+++ b/metropolis/test/e2e/suites/kubernetes/run_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package kubernetes
 
 import (
diff --git a/metropolis/test/lacp/lacp_test.go b/metropolis/test/lacp/lacp_test.go
index dbcc79e..f28302c 100644
--- a/metropolis/test/lacp/lacp_test.go
+++ b/metropolis/test/lacp/lacp_test.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package lacp contains an integration test for our custom LACP patches.
 // It tests relevant behavior that other parts of the Monogon network stack
 // rely on, like proper carrier state indications.
diff --git a/metropolis/test/launch/cli/launch-cluster/main.go b/metropolis/test/launch/cli/launch-cluster/main.go
index f5e0537..1aec556 100644
--- a/metropolis/test/launch/cli/launch-cluster/main.go
+++ b/metropolis/test/launch/cli/launch-cluster/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/test/launch/cli/launch/main.go b/metropolis/test/launch/cli/launch/main.go
index eb3f003..b4acd68 100644
--- a/metropolis/test/launch/cli/launch/main.go
+++ b/metropolis/test/launch/cli/launch/main.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package main
 
diff --git a/metropolis/test/launch/cluster.go b/metropolis/test/launch/cluster.go
index 20c3c67..dab453b 100644
--- a/metropolis/test/launch/cluster.go
+++ b/metropolis/test/launch/cluster.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // cluster builds on the launch package and implements launching Metropolis
 // nodes and clusters in a virtualized environment using qemu. It's kept in a
 // separate package as it depends on a Metropolis node image, which might not be
diff --git a/metropolis/test/launch/insecure_key.go b/metropolis/test/launch/insecure_key.go
index 72af26f..3c39835 100644
--- a/metropolis/test/launch/insecure_key.go
+++ b/metropolis/test/launch/insecure_key.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package launch
 
diff --git a/metropolis/test/launch/launch.go b/metropolis/test/launch/launch.go
index d6c29fe..759bf28 100644
--- a/metropolis/test/launch/launch.go
+++ b/metropolis/test/launch/launch.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package launch
 
 import (
diff --git a/metropolis/test/launch/metroctl.go b/metropolis/test/launch/metroctl.go
index 711855b..0d33849 100644
--- a/metropolis/test/launch/metroctl.go
+++ b/metropolis/test/launch/metroctl.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package launch
 
 import (
diff --git a/metropolis/test/launch/prefixed_stdio.go b/metropolis/test/launch/prefixed_stdio.go
index c851c44..2e4bbd2 100644
--- a/metropolis/test/launch/prefixed_stdio.go
+++ b/metropolis/test/launch/prefixed_stdio.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package launch
 
 import (
diff --git a/metropolis/test/launch/swtpm.go b/metropolis/test/launch/swtpm.go
index 5691c86..3c48227 100644
--- a/metropolis/test/launch/swtpm.go
+++ b/metropolis/test/launch/swtpm.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package launch
 
 import (
diff --git a/metropolis/test/localregistry/localregistry.go b/metropolis/test/localregistry/localregistry.go
index 120eb61..1f648e0 100644
--- a/metropolis/test/localregistry/localregistry.go
+++ b/metropolis/test/localregistry/localregistry.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package localregistry implements a read-only OCI Distribution / Docker
 // V2 container image registry backed by local layers.
 package localregistry
diff --git a/metropolis/test/localregistry/spec/gomod-generated-placeholder.go b/metropolis/test/localregistry/spec/gomod-generated-placeholder.go
index f09cd57..ca2145c 100644
--- a/metropolis/test/localregistry/spec/gomod-generated-placeholder.go
+++ b/metropolis/test/localregistry/spec/gomod-generated-placeholder.go
@@ -1 +1,4 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package spec
diff --git a/metropolis/test/nanoswitch/nanoswitch.go b/metropolis/test/nanoswitch/nanoswitch.go
index ca1d77d..9ca2ff8 100644
--- a/metropolis/test/nanoswitch/nanoswitch.go
+++ b/metropolis/test/nanoswitch/nanoswitch.go
@@ -1,18 +1,5 @@
-// Copyright 2020 The Monogon Project Authors.
-//
+// Copyright The Monogon Project Authors.
 // SPDX-License-Identifier: Apache-2.0
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 // nanoswitch is a virtualized switch/router combo intended for testing.
 // It uses the first interface as an external interface to connect to the host
diff --git a/metropolis/test/nanoswitch/socks.go b/metropolis/test/nanoswitch/socks.go
index 1230903..4ba1d0a 100644
--- a/metropolis/test/nanoswitch/socks.go
+++ b/metropolis/test/nanoswitch/socks.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/test/swtpm/certtool/main.go b/metropolis/test/swtpm/certtool/main.go
index 5079c54..600d9aa 100644
--- a/metropolis/test/swtpm/certtool/main.go
+++ b/metropolis/test/swtpm/certtool/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 // Minimal GnuTLS certtool-like tool in Go. Implements only what's needed for
diff --git a/metropolis/test/swtpm/swtpm_cert/asn1.go b/metropolis/test/swtpm/swtpm_cert/asn1.go
index 4136a25..1fe87ee 100644
--- a/metropolis/test/swtpm/swtpm_cert/asn1.go
+++ b/metropolis/test/swtpm/swtpm_cert/asn1.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 import (
diff --git a/metropolis/test/swtpm/swtpm_cert/main.go b/metropolis/test/swtpm/swtpm_cert/main.go
index 8d5663b..e6d1a01 100644
--- a/metropolis/test/swtpm/swtpm_cert/main.go
+++ b/metropolis/test/swtpm/swtpm_cert/main.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package main
 
 // swtpm_cert (from swtpm project) reimplemented in Go.
diff --git a/metropolis/test/util/curator.go b/metropolis/test/util/curator.go
index 28fa7b1..35c0b97 100644
--- a/metropolis/test/util/curator.go
+++ b/metropolis/test/util/curator.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package util
 
 import (
diff --git a/metropolis/test/util/rpc.go b/metropolis/test/util/rpc.go
index c31c935..e2558a3 100644
--- a/metropolis/test/util/rpc.go
+++ b/metropolis/test/util/rpc.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 package util
 
 import (
diff --git a/metropolis/test/util/runners.go b/metropolis/test/util/runners.go
index 95de02a..4a8a1e9 100644
--- a/metropolis/test/util/runners.go
+++ b/metropolis/test/util/runners.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // This file implements test helper functions that augment the way any given
 // test is run.
 package util