diff --git a/src/test/java/dev/lukebemish/codecextras/test/CodecAssertions.java b/src/test/java/dev/lukebemish/codecextras/test/CodecAssertions.java
index 0d84247..8044ffd 100644
--- a/src/test/java/dev/lukebemish/codecextras/test/CodecAssertions.java
+++ b/src/test/java/dev/lukebemish/codecextras/test/CodecAssertions.java
@@ -20,7 +20,7 @@ public static <O> void assertDecodes(DynamicOps<JsonElement> jsonOps, String jso
 	public static <O, T> void assertDecodes(DynamicOps<T> ops, T data, O expected, Codec<O> codec) {
 		DataResult<O> dataResult = codec.parse(ops, data);
 		Assertions.assertTrue(dataResult.result().isPresent());
-		Assertions.assertEquals(dataResult.result().get(), expected);
+		Assertions.assertEquals(expected, dataResult.result().get());
 	}
 
 	public static <O> void assertEncodes(DynamicOps<JsonElement> jsonOps, O value, String json, Codec<O> codec) {
@@ -32,7 +32,7 @@ public static <O> void assertEncodes(DynamicOps<JsonElement> jsonOps, O value, S
 	public static <O, T> void assertEncodes(DynamicOps<T> ops, O value, T expected, Codec<O> codec) {
 		DataResult<T> dataResult = codec.encodeStart(ops, value);
 		Assertions.assertTrue(dataResult.result().isPresent());
-		Assertions.assertEquals(dataResult.result().get(), expected);
+		Assertions.assertEquals(expected, dataResult.result().get());
 	}
 
 	public static void assertJsonEquals(String expected, String actual) {
diff --git a/src/test/java/dev/lukebemish/codecextras/test/mutalbe/TestDataElements.java b/src/test/java/dev/lukebemish/codecextras/test/mutalbe/TestDataElements.java
index 2b0c770..4f4df8c 100644
--- a/src/test/java/dev/lukebemish/codecextras/test/mutalbe/TestDataElements.java
+++ b/src/test/java/dev/lukebemish/codecextras/test/mutalbe/TestDataElements.java
@@ -38,24 +38,15 @@ public int hashCode() {
 	}
 
 	private final String both = """
-			[
-				{
-					"index": 0,
-					"value": "Hello"
-				},
-				{
-					"index": 1,
-					"value": 42
-				}
-			]""";
+			{
+				"string": "Hello",
+				"integer": 42
+			}""";
 
 	private final String onlyChanged = """
-			[
-				{
-					"index": 1,
-					"value": 42
-				}
-			]""";
+			{
+				"integer": 42
+			}""";
 
 	@Test
 	void testEncodeMutable() {