diff --git a/etc/snapshot_etc_test.go b/etc/snapshot_etc_test.go
new file mode 100644
index 0000000..b9d5504
--- /dev/null
+++ b/etc/snapshot_etc_test.go
@@ -0,0 +1,185 @@
+// Copyright 2021 The Android Open Source Project
+//
+// 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 etc
+
+import (
+	"android/soong/android"
+	"testing"
+
+	"github.com/google/blueprint"
+)
+
+var registerSourceModule = func(ctx android.RegistrationContext) {
+	ctx.RegisterModuleType("source", newSourceModule)
+}
+
+type sourceModuleProperties struct {
+	Deps []string `android:"path,arch_variant"`
+}
+
+type sourceModule struct {
+	android.ModuleBase
+	android.OverridableModuleBase
+
+	properties                                     sourceModuleProperties
+	dependsOnSourceModule, dependsOnPrebuiltModule bool
+	deps                                           android.Paths
+	src                                            android.Path
+}
+
+func newSourceModule() android.Module {
+	m := &sourceModule{}
+	m.AddProperties(&m.properties)
+	android.InitAndroidArchModule(m, android.DeviceSupported, android.MultilibFirst)
+	android.InitOverridableModule(m, nil)
+	return m
+}
+
+func (s *sourceModule) OverridablePropertiesDepsMutator(ctx android.BottomUpMutatorContext) {
+	// s.properties.Deps are annotated with android:path, so they are
+	// automatically added to the dependency by pathDeps mutator
+}
+
+func (s *sourceModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	s.deps = android.PathsForModuleSrc(ctx, s.properties.Deps)
+	s.src = android.PathForModuleSrc(ctx, "source_file")
+}
+
+func (s *sourceModule) Srcs() android.Paths {
+	return android.Paths{s.src}
+}
+
+var prepareForSnapshotEtcTest = android.GroupFixturePreparers(
+	android.PrepareForTestWithArchMutator,
+	android.PrepareForTestWithPrebuilts,
+	PrepareForTestWithPrebuiltEtc,
+	android.FixtureRegisterWithContext(RegisterSnapshotEtcModule),
+	android.FixtureRegisterWithContext(registerSourceModule),
+	android.FixtureMergeMockFs(android.MockFS{
+		"foo.conf": nil,
+		"bar.conf": nil,
+	}),
+)
+
+func TestSnapshotWithFilename(t *testing.T) {
+	var androidBp = `
+	snapshot_etc {
+		name: "etc_module",
+		src: "foo.conf",
+		filename: "bar.conf",
+	}
+	`
+
+	result := prepareForSnapshotEtcTest.RunTestWithBp(t, androidBp)
+	for _, variant := range result.ModuleVariantsForTests("etc_module") {
+		module := result.ModuleForTests("etc_module", variant)
+		s, ok := module.Module().(*SnapshotEtc)
+		if !ok {
+			t.Errorf("Expected snapshot_etc module type")
+		}
+		if s.outputFilePath.Base() != "bar.conf" {
+			t.Errorf("Output file path does not match with specified filename")
+		}
+	}
+}
+
+func TestSnapshotEtcWithOrigin(t *testing.T) {
+	var androidBp = `
+	prebuilt_etc {
+		name: "etc_module",
+		src: "foo.conf",
+	}
+
+	snapshot_etc {
+		name: "etc_module",
+		src: "bar.conf",
+	}
+
+	source {
+		name: "source",
+		deps: [":etc_module"],
+	}
+	`
+
+	result := prepareForSnapshotEtcTest.RunTestWithBp(t, androidBp)
+
+	for _, variant := range result.ModuleVariantsForTests("source") {
+		source := result.ModuleForTests("source", variant)
+
+		result.VisitDirectDeps(source.Module(), func(m blueprint.Module) {
+			if _, ok := m.(*PrebuiltEtc); !ok {
+				t.Errorf("Original prebuilt_etc module expected.")
+			}
+		})
+	}
+}
+
+func TestSnapshotEtcWithOriginAndPrefer(t *testing.T) {
+	var androidBp = `
+	prebuilt_etc {
+		name: "etc_module",
+		src: "foo.conf",
+	}
+
+	snapshot_etc {
+		name: "etc_module",
+		src: "bar.conf",
+		prefer: true,
+	}
+
+	source {
+		name: "source",
+		deps: [":etc_module"],
+	}
+	`
+
+	result := prepareForSnapshotEtcTest.RunTestWithBp(t, androidBp)
+
+	for _, variant := range result.ModuleVariantsForTests("source") {
+		source := result.ModuleForTests("source", variant)
+
+		result.VisitDirectDeps(source.Module(), func(m blueprint.Module) {
+			if _, ok := m.(*SnapshotEtc); !ok {
+				t.Errorf("Preferred snapshot_etc module expected.")
+			}
+		})
+	}
+}
+
+func TestSnapshotEtcWithoutOrigin(t *testing.T) {
+	var androidBp = `
+	snapshot_etc {
+		name: "etc_module",
+		src: "bar.conf",
+	}
+
+	source {
+		name: "source",
+		deps: [":etc_module"],
+	}
+	`
+
+	result := prepareForSnapshotEtcTest.RunTestWithBp(t, androidBp)
+
+	for _, variant := range result.ModuleVariantsForTests("source") {
+		source := result.ModuleForTests("source", variant)
+
+		result.VisitDirectDeps(source.Module(), func(m blueprint.Module) {
+			if _, ok := m.(*SnapshotEtc); !ok {
+				t.Errorf("Only source snapshot_etc module expected.")
+			}
+		})
+	}
+}