diff --git a/android/fixture.go b/android/fixture.go
index 2085e43..9251615 100644
--- a/android/fixture.go
+++ b/android/fixture.go
@@ -484,6 +484,18 @@
 	}
 }
 
+// AssertErrorMessageEquals checks if the error is not nil and has the expected message. If it does
+// not then this reports an error prefixed with the supplied message and including a reason for why
+// it failed.
+func (h *TestHelper) AssertErrorMessageEquals(message string, expected string, actual error) {
+	h.Helper()
+	if actual == nil {
+		h.Errorf("Expected error but was nil")
+	} else if actual.Error() != expected {
+		h.Errorf("%s: expected %s, actual %s", message, expected, actual.Error())
+	}
+}
+
 // AssertTrimmedStringEquals checks if the expected and actual values are the same after trimming
 // leading and trailing spaces from them both. If they are not then it reports an error prefixed
 // with the supplied message and including a reason for why it failed.
@@ -538,6 +550,23 @@
 	}
 }
 
+// AssertPanic checks that the supplied function panics as expected.
+func (h *TestHelper) AssertPanic(message string, funcThatShouldPanic func()) {
+	h.Helper()
+	panicked := false
+	func() {
+		defer func() {
+			if x := recover(); x != nil {
+				panicked = true
+			}
+		}()
+		funcThatShouldPanic()
+	}()
+	if !panicked {
+		h.Error(message)
+	}
+}
+
 // Struct to allow TestResult to embed a *TestContext and allow call forwarding to its methods.
 type testContext struct {
 	*TestContext
diff --git a/sdk/bp_test.go b/sdk/bp_test.go
index e1edc51..a7164a5 100644
--- a/sdk/bp_test.go
+++ b/sdk/bp_test.go
@@ -54,7 +54,7 @@
 	return str
 }
 
-func checkPropertySetFixture(h *TestHelper, val interface{}, hasTags bool) {
+func checkPropertySetFixture(h android.TestHelper, val interface{}, hasTags bool) {
 	set := val.(*bpPropertySet)
 	h.AssertDeepEquals("wrong x value", "taxi", set.getValue("x"))
 	h.AssertDeepEquals("wrong y value", 1729, set.getValue("y"))
@@ -73,7 +73,7 @@
 }
 
 func TestAddPropertySimple(t *testing.T) {
-	h := &TestHelper{t}
+	h := android.TestHelper{t}
 	set := newPropertySet()
 	for name, val := range map[string]interface{}{
 		"x":   "taxi",
@@ -92,7 +92,7 @@
 }
 
 func TestAddPropertySubset(t *testing.T) {
-	h := &TestHelper{t}
+	h := android.TestHelper{t}
 	getFixtureMap := map[string]func() interface{}{
 		"property set":    propertySetFixture,
 		"property struct": propertyStructFixture,
@@ -139,7 +139,7 @@
 }
 
 func TestAddPropertySetNew(t *testing.T) {
-	h := &TestHelper{t}
+	h := android.TestHelper{t}
 	set := newPropertySet()
 	subset := set.AddPropertySet("sub")
 	subset.AddProperty("new", "d^^b")
@@ -147,7 +147,7 @@
 }
 
 func TestAddPropertySetExisting(t *testing.T) {
-	h := &TestHelper{t}
+	h := android.TestHelper{t}
 	set := propertySetFixture().(*bpPropertySet)
 	subset := set.AddPropertySet("sub")
 	subset.AddProperty("new", "d^^b")
@@ -181,7 +181,7 @@
 
 func TestTransformRemoveProperty(t *testing.T) {
 
-	helper := &TestHelper{t}
+	helper := android.TestHelper{t}
 
 	set := newPropertySet()
 	set.AddProperty("name", "name")
@@ -196,7 +196,7 @@
 
 func TestTransformRemovePropertySet(t *testing.T) {
 
-	helper := &TestHelper{t}
+	helper := android.TestHelper{t}
 
 	set := newPropertySet()
 	set.AddProperty("name", "name")
diff --git a/sdk/sdk_test.go b/sdk/sdk_test.go
index c4dc41b..8f885a1 100644
--- a/sdk/sdk_test.go
+++ b/sdk/sdk_test.go
@@ -390,7 +390,7 @@
 
 	extractor := newCommonValueExtractor(common)
 
-	h := TestHelper{t}
+	h := android.TestHelper{t}
 
 	err := extractor.extractCommonProperties(common, structs)
 	h.AssertDeepEquals("unexpected error", nil, err)
@@ -465,7 +465,7 @@
 
 	extractor := newCommonValueExtractor(common)
 
-	h := TestHelper{t}
+	h := android.TestHelper{t}
 
 	err := extractor.extractCommonProperties(common, structs)
 	h.AssertErrorMessageEquals("unexpected error", `field "S_Common" is not tagged as "arch_variant" but has arch specific properties:
diff --git a/sdk/testing.go b/sdk/testing.go
index 7a2540a..c401c86 100644
--- a/sdk/testing.go
+++ b/sdk/testing.go
@@ -19,7 +19,6 @@
 	"io/ioutil"
 	"os"
 	"path/filepath"
-	"reflect"
 	"strings"
 	"testing"
 
@@ -141,7 +140,7 @@
 	_, errs = ctx.PrepareBuildActions(config)
 	android.FailIfErrored(t, errs)
 	return &testSdkResult{
-		TestHelper: TestHelper{t: t},
+		TestHelper: android.TestHelper{T: t},
 		ctx:        ctx,
 		config:     config,
 	}
@@ -185,63 +184,10 @@
 	return ret
 }
 
-// Provides general test support.
-type TestHelper struct {
-	t *testing.T
-}
-
-func (h *TestHelper) AssertStringEquals(message string, expected string, actual string) {
-	h.t.Helper()
-	if actual != expected {
-		h.t.Errorf("%s: expected %s, actual %s", message, expected, actual)
-	}
-}
-
-func (h *TestHelper) AssertErrorMessageEquals(message string, expected string, actual error) {
-	h.t.Helper()
-	if actual == nil {
-		h.t.Errorf("Expected error but was nil")
-	} else if actual.Error() != expected {
-		h.t.Errorf("%s: expected %s, actual %s", message, expected, actual.Error())
-	}
-}
-
-func (h *TestHelper) AssertTrimmedStringEquals(message string, expected string, actual string) {
-	h.t.Helper()
-	expected = strings.TrimSpace(expected)
-	actual = strings.TrimSpace(actual)
-	if actual != expected {
-		h.t.Errorf("%s: expected:\n%s\nactual:\n%s\n", message, expected, actual)
-	}
-}
-
-func (h *TestHelper) AssertDeepEquals(message string, expected interface{}, actual interface{}) {
-	h.t.Helper()
-	if !reflect.DeepEqual(actual, expected) {
-		h.t.Errorf("%s: expected %#v, actual %#v", message, expected, actual)
-	}
-}
-
-func (h *TestHelper) AssertPanic(message string, funcThatShouldPanic func()) {
-	h.t.Helper()
-	panicked := false
-	func() {
-		defer func() {
-			if x := recover(); x != nil {
-				panicked = true
-			}
-		}()
-		funcThatShouldPanic()
-	}()
-	if !panicked {
-		h.t.Error(message)
-	}
-}
-
 // Encapsulates result of processing an SDK definition. Provides support for
 // checking the state of the build structures.
 type testSdkResult struct {
-	TestHelper
+	android.TestHelper
 	ctx    *android.TestContext
 	config android.Config
 }
@@ -295,7 +241,7 @@
 			info.intermediateZip = info.outputZip
 			mergeInput := android.NormalizePathForTesting(bp.Input)
 			if info.intermediateZip != mergeInput {
-				r.t.Errorf("Expected intermediate zip %s to be an input to merge zips but found %s instead",
+				r.Errorf("Expected intermediate zip %s to be an input to merge zips but found %s instead",
 					info.intermediateZip, mergeInput)
 			}
 
@@ -328,7 +274,7 @@
 // Allows each test to customize what is checked without duplicating lots of code
 // or proliferating check methods of different flavors.
 func (r *testSdkResult) CheckSnapshot(name string, dir string, checkers ...snapshotBuildInfoChecker) {
-	r.t.Helper()
+	r.Helper()
 
 	// The sdk CommonOS variant is always responsible for generating the snapshot.
 	variant := android.CommonOS.Name
@@ -358,7 +304,7 @@
 	}
 
 	// Process the generated bp file to make sure it is valid.
-	testSdkWithFs(r.t, snapshotBuildInfo.androidBpContents, fs)
+	testSdkWithFs(r.T, snapshotBuildInfo.androidBpContents, fs)
 }
 
 type snapshotBuildInfoChecker func(info *snapshotBuildInfo)
@@ -368,7 +314,7 @@
 // Both the expected and actual string are both trimmed before comparing.
 func checkAndroidBpContents(expected string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		info.r.AssertTrimmedStringEquals("Android.bp contents do not match", expected, info.androidBpContents)
 	}
 }
@@ -380,7 +326,7 @@
 // Both the expected and actual string are both trimmed before comparing.
 func checkUnversionedAndroidBpContents(expected string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		info.r.AssertTrimmedStringEquals("unversioned Android.bp contents do not match", expected, info.androidUnversionedBpContents)
 	}
 }
@@ -395,7 +341,7 @@
 // Both the expected and actual string are both trimmed before comparing.
 func checkVersionedAndroidBpContents(expected string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		info.r.AssertTrimmedStringEquals("versioned Android.bp contents do not match", expected, info.androidVersionedBpContents)
 	}
 }
@@ -407,14 +353,14 @@
 // before comparing.
 func checkAllCopyRules(expected string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		info.r.AssertTrimmedStringEquals("Incorrect copy rules", expected, info.copyRules)
 	}
 }
 
 func checkAllOtherCopyRules(expected string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		info.r.AssertTrimmedStringEquals("Incorrect copy rules", expected, info.otherCopyRules)
 	}
 }
@@ -422,9 +368,9 @@
 // Check that the specified paths match the list of zips to merge with the intermediate zip.
 func checkMergeZips(expected ...string) snapshotBuildInfoChecker {
 	return func(info *snapshotBuildInfo) {
-		info.r.t.Helper()
+		info.r.Helper()
 		if info.intermediateZip == "" {
-			info.r.t.Errorf("No intermediate zip file was created")
+			info.r.Errorf("No intermediate zip file was created")
 		}
 
 		info.r.AssertDeepEquals("mismatching merge zip files", expected, info.mergeZips)