diff --git a/build.gradle b/build.gradle
index f61b5ee0..0b4875e3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -284,6 +284,16 @@ test {
 	}
 }
 
+// Workaround https://github.com/gradle/gradle/issues/25898
+tasks.withType(Test).configureEach {
+	jvmArgs = [
+		'--add-opens=java.base/java.lang=ALL-UNNAMED',
+		'--add-opens=java.base/java.util=ALL-UNNAMED',
+		'--add-opens=java.base/java.lang.invoke=ALL-UNNAMED',
+		'--add-opens=java.base/java.net=ALL-UNNAMED'
+	]
+}
+
 
 import org.gradle.api.internal.artifacts.configurations.ConfigurationRoles
 import org.gradle.launcher.cli.KotlinDslVersion
diff --git a/gradle/test.libs.versions.toml b/gradle/test.libs.versions.toml
index 8cc5457c..5de78a1f 100644
--- a/gradle/test.libs.versions.toml
+++ b/gradle/test.libs.versions.toml
@@ -6,7 +6,7 @@ mockito = "5.11.0"
 java-debug = "0.52.0"
 mixin = "0.12.5+mixin.0.8.5"
 
-gradle-nightly = "8.9-20240426001649+0000"
+gradle-nightly = "8.9-20240505002558+0000"
 fabric-loader = "0.15.10"
 fabric-installer = "1.0.1"
 
diff --git a/src/main/java/net/fabricmc/loom/task/service/JarManifestService.java b/src/main/java/net/fabricmc/loom/task/service/JarManifestService.java
index 08f17632..4858575b 100644
--- a/src/main/java/net/fabricmc/loom/task/service/JarManifestService.java
+++ b/src/main/java/net/fabricmc/loom/task/service/JarManifestService.java
@@ -103,7 +103,8 @@ public abstract class JarManifestService implements BuildService<JarManifestServ
 		}
 	}
 
-	private record MixinVersion(String group, String version) implements Serializable { }
+	// Must be public for configuration cache
+	public record MixinVersion(String group, String version) implements Serializable { }
 
 	private static Provider<MixinVersion> getMixinVersion(Project project) {
 		return project.getConfigurations().named(Constants.Configurations.LOADER_DEPENDENCIES).map(configuration -> {
diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/ConfigurationCacheTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/ConfigurationCacheTest.groovy
index 8b900f30..a6af3e2d 100644
--- a/src/test/groovy/net/fabricmc/loom/test/integration/ConfigurationCacheTest.groovy
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/ConfigurationCacheTest.groovy
@@ -54,8 +54,10 @@ class ConfigurationCacheTest extends Specification implements GradleProjectTestT
 		result2.task(":${task}").outcome != FAILED
 
 		where:
-		task                    | _
-		"help"                  | _
-		"configureClientLaunch" | _
+		task                      | _
+		"help"                    | _
+		"configureClientLaunch"   | _
+		"jar"                     | _
+		"check"                   | _
 	}
 }