diff --git a/mk2rbc/version_defaults_test.go b/mk2rbc/version_defaults_test.go
new file mode 100644
index 0000000..c78fa32
--- /dev/null
+++ b/mk2rbc/version_defaults_test.go
@@ -0,0 +1,60 @@
+package mk2rbc
+
+import (
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestParseVersionDefaults(t *testing.T) {
+	testDir := getTestDirectory()
+	abspath := func(relPath string) string { return filepath.Join(testDir, relPath) }
+	actualProducts, err := ParseVersionDefaults(abspath("version_defaults.mk.test"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedProducts := map[string]string{
+		"DEFAULT_PLATFORM_VERSION":            "TP1A",
+		"MAX_PLATFORM_VERSION":                "TP1A",
+		"MIN_PLATFORM_VERSION":                "TP1A",
+		"PLATFORM_BASE_SDK_EXTENSION_VERSION": "0",
+		"PLATFORM_SDK_EXTENSION_VERSION":      "1",
+		"PLATFORM_SDK_VERSION":                "31",
+		"PLATFORM_SECURITY_PATCH":             "2021-10-05",
+		"PLATFORM_VERSION_LAST_STABLE":        "12",
+		"PLATFORM_VERSION_CODENAME.SP2A":      "Sv2",
+		"PLATFORM_VERSION_CODENAME.TP1A":      "Tiramisu",
+	}
+	if !reflect.DeepEqual(actualProducts, expectedProducts) {
+		t.Errorf("\nExpected: %v\n  Actual: %v", expectedProducts, actualProducts)
+	}
+}
+
+func TestVersionDefaults(t *testing.T) {
+	testDir := getTestDirectory()
+	abspath := func(relPath string) string { return filepath.Join(testDir, relPath) }
+	actualProducts, err := ParseVersionDefaults(abspath("version_defaults.mk.test"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	expectedString := `version_defaults = struct(
+    default_platform_version = "TP1A",
+    max_platform_version = "TP1A",
+    min_platform_version = "TP1A",
+    platform_base_sdk_extension_version = 0,
+    platform_sdk_extension_version = 1,
+    platform_sdk_version = 31,
+    platform_security_patch = "2021-10-05",
+    platform_version_last_stable = 12,
+    codenames = { "SP2A": "Sv2", "TP1A": "Tiramisu" }
+)
+`
+	actualString := VersionDefaults(actualProducts)
+	if !reflect.DeepEqual(actualString, expectedString) {
+		t.Errorf("\nExpected: %v\nActual:\n%v",
+			strings.ReplaceAll(expectedString, "\n", "␤\n"),
+			strings.ReplaceAll(actualString, "\n", "␤\n"))
+	}
+
+}