Java 8 compilation failure in ConfigurationParametersTest.java

Index: oak-parent/pom.xml
===================================================================
--- oak-parent/pom.xml  (revision 1790388)
+++ oak-parent/pom.xml  (working copy)
@@ -63,8 +63,8 @@
     <h2.version>1.4.194</h2.version>
     <findbugs.version>3.0.0</findbugs.version>
     <derby.version>10.12.1.1</derby.version>
-    <java.version>1.7</java.version>
-    <java.version.signature>java17</java.version.signature>
+    <java.version>1.8</java.version>
+    <java.version.signature>java18</java.version.signature>

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:testCompile (default-testCompile) on project oak-core: Compilation failure
[ERROR] C:\projects\apache\oak\trunk\oak-core\src\test\java\org\apache\jackrabbit\oak\spi\security\ConfigurationParametersTest.java:[291,8] error: reference to assertEquals is ambiguous