diff --git a/SpongeAPI b/SpongeAPI
index a490075071b..c3724c08199 160000
--- a/SpongeAPI
+++ b/SpongeAPI
@@ -1 +1 @@
-Subproject commit a490075071b22f7b6a51d92ed1dda84cae796ca5
+Subproject commit c3724c08199194df1b8665b5129481b912519ee9
diff --git a/src/mixins/java/org/spongepowered/common/mixin/api/minecraft/world/level/material/PushReactionMixin_API.java b/src/mixins/java/org/spongepowered/common/mixin/api/minecraft/world/level/material/PushReactionMixin_API.java
index 3ac720c6c0f..ddc3f233bd3 100644
--- a/src/mixins/java/org/spongepowered/common/mixin/api/minecraft/world/level/material/PushReactionMixin_API.java
+++ b/src/mixins/java/org/spongepowered/common/mixin/api/minecraft/world/level/material/PushReactionMixin_API.java
@@ -28,6 +28,6 @@
 import org.spongepowered.asm.mixin.Mixin;
 
 @Mixin(net.minecraft.world.level.material.PushReaction.class)
-public class PushReactionMixin_API implements PushReaction {
+public abstract class PushReactionMixin_API implements PushReaction {
 
 }
diff --git a/src/test/java/org/spongepowered/common/test/stub/util/StubMirror.java b/src/test/java/org/spongepowered/common/test/stub/util/StubMirror.java
index 9e022af2715..73151a0a24f 100644
--- a/src/test/java/org/spongepowered/common/test/stub/util/StubMirror.java
+++ b/src/test/java/org/spongepowered/common/test/stub/util/StubMirror.java
@@ -39,4 +39,8 @@ public static void registerDefaults(final StubbedRegistry<Mirror> registry) {
         registry.register(new StubKey("sponge", "front_back"), StubMirror.FRONT_BACK);
     }
 
+    @Override
+    public String serializationString() {
+        return this.name().toLowerCase();
+    }
 }
diff --git a/src/test/java/org/spongepowered/common/test/stub/util/StubRotations.java b/src/test/java/org/spongepowered/common/test/stub/util/StubRotations.java
index ae07d2b3486..bcb78e62da9 100644
--- a/src/test/java/org/spongepowered/common/test/stub/util/StubRotations.java
+++ b/src/test/java/org/spongepowered/common/test/stub/util/StubRotations.java
@@ -89,4 +89,9 @@ public Rotation and(final Rotation rotation) {
     public Angle angle() {
         return Angle.fromDegrees(this.angle);
     }
+
+    @Override
+    public String serializationString() {
+        return this.name().toLowerCase();
+    }
 }