diff --git a/pkg/minikube/assets/addons_test.go b/pkg/minikube/assets/addons_test.go
new file mode 100644
index 000000000000..22530cff069c
--- /dev/null
+++ b/pkg/minikube/assets/addons_test.go
@@ -0,0 +1,144 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved.
+
+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 assets
+
+import "testing"
+
+// mapsEqual returns true if and only if `a` contains all the same pairs as `b`.
+func mapsEqual(a, b map[string]string) bool {
+	for aKey, aValue := range a {
+		if bValue, ok := b[aKey]; !ok || aValue != bValue {
+			return false
+		}
+	}
+
+	for bKey := range b {
+		if _, ok := a[bKey]; !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func TestParseMapString(t *testing.T) {
+	cases := map[string]map[string]string{
+		"Ardvark=1,B=2,Cantaloupe=3":         {"Ardvark": "1", "B": "2", "Cantaloupe": "3"},
+		"A=,B=2,C=":                          {"A": "", "B": "2", "C": ""},
+		"":                                   {},
+		"malformed,good=howdy,manyequals==,": {"good": "howdy"},
+	}
+	for actual, expected := range cases {
+		if parsedMap := parseMapString(actual); !mapsEqual(parsedMap, expected) {
+			t.Errorf("Parsed map from string \"%s\" differs from expected map: Actual: %v Expected: %v", actual, parsedMap, expected)
+		}
+	}
+}
+
+func TestMergeMaps(t *testing.T) {
+	type TestCase struct {
+		sourceMap   map[string]string
+		overrideMap map[string]string
+		expectedMap map[string]string
+	}
+	cases := []TestCase{
+		{
+			sourceMap:   map[string]string{"A": "1", "B": "2"},
+			overrideMap: map[string]string{"B": "7", "C": "3"},
+			expectedMap: map[string]string{"A": "1", "B": "7", "C": "3"},
+		},
+		{
+			sourceMap:   map[string]string{"B": "7", "C": "3"},
+			overrideMap: map[string]string{"A": "1", "B": "2"},
+			expectedMap: map[string]string{"A": "1", "B": "2", "C": "3"},
+		},
+		{
+			sourceMap:   map[string]string{"B": "7", "C": "3"},
+			overrideMap: map[string]string{},
+			expectedMap: map[string]string{"B": "7", "C": "3"},
+		},
+		{
+			sourceMap:   map[string]string{},
+			overrideMap: map[string]string{"B": "7", "C": "3"},
+			expectedMap: map[string]string{"B": "7", "C": "3"},
+		},
+	}
+	for _, test := range cases {
+		if actualMap := mergeMaps(test.sourceMap, test.overrideMap); !mapsEqual(actualMap, test.expectedMap) {
+			t.Errorf("Merging maps (source=%v, override=%v) differs from expected map: Actual: %v Expected: %v", test.sourceMap, test.overrideMap, actualMap, test.expectedMap)
+		}
+	}
+}
+
+func TestFilterKeySpace(t *testing.T) {
+	type TestCase struct {
+		keySpace    map[string]string
+		targetMap   map[string]string
+		expectedMap map[string]string
+	}
+	cases := []TestCase{
+		{
+			keySpace:    map[string]string{"A": "0", "B": ""},
+			targetMap:   map[string]string{"B": "1", "C": "2", "D": "3"},
+			expectedMap: map[string]string{"B": "1"},
+		},
+		{
+			keySpace:    map[string]string{},
+			targetMap:   map[string]string{"B": "1", "C": "2", "D": "3"},
+			expectedMap: map[string]string{},
+		},
+		{
+			keySpace:    map[string]string{"B": "1", "C": "2", "D": "3"},
+			targetMap:   map[string]string{},
+			expectedMap: map[string]string{},
+		},
+	}
+	for _, test := range cases {
+		if actualMap := filterKeySpace(test.keySpace, test.targetMap); !mapsEqual(actualMap, test.expectedMap) {
+			t.Errorf("Filtering keyspace of map (keyspace=%v, target=%v) differs from expected map: Actual: %v Expected: %v", test.keySpace, test.targetMap, actualMap, test.expectedMap)
+		}
+	}
+}
+
+func TestOverrideDefautls(t *testing.T) {
+	type TestCase struct {
+		defaultMap  map[string]string
+		overrideMap map[string]string
+		expectedMap map[string]string
+	}
+	cases := []TestCase{
+		{
+			defaultMap:  map[string]string{"A": "1", "B": "2", "C": "3"},
+			overrideMap: map[string]string{"B": "7", "C": "8"},
+			expectedMap: map[string]string{"A": "1", "B": "7", "C": "8"},
+		},
+		{
+			defaultMap:  map[string]string{"A": "1", "B": "2", "C": "3"},
+			overrideMap: map[string]string{"B": "7", "D": "8", "E": "9"},
+			expectedMap: map[string]string{"A": "1", "B": "7", "C": "3"},
+		},
+		{
+			defaultMap:  map[string]string{"A": "1", "B": "2", "C": "3"},
+			overrideMap: map[string]string{"B": "7", "D": "8", "E": "9"},
+			expectedMap: map[string]string{"A": "1", "B": "7", "C": "3"},
+		},
+	}
+	for _, test := range cases {
+		if actualMap := overrideDefaults(test.defaultMap, test.overrideMap); !mapsEqual(actualMap, test.expectedMap) {
+			t.Errorf("Override defaults (defaults=%v, overrides=%v) differs from expected map: Actual: %v Expected: %v", test.defaultMap, test.overrideMap, actualMap, test.expectedMap)
+		}
+	}
+}