diff --git a/src/test/groovy/net/fabricmc/loom/test/integration/forge/ForgeTest.groovy b/src/test/groovy/net/fabricmc/loom/test/integration/forge/ForgeTest.groovy
index 28dfde1b..dc266e31 100644
--- a/src/test/groovy/net/fabricmc/loom/test/integration/forge/ForgeTest.groovy
+++ b/src/test/groovy/net/fabricmc/loom/test/integration/forge/ForgeTest.groovy
@@ -48,6 +48,8 @@ class ForgeTest extends Specification implements GradleProjectTestTrait {
 
 		where:
 			mcVersion | forgeVersion | mappings
+			'1.18.1'  | "39.0.63"    | "loom.officialMojangMappings()"
+			'1.18.1'  | "39.0.63"    | "\"net.fabricmc:yarn:1.18.1+build.22:v2\""
 			'1.17.1'  | "37.0.67"    | "loom.officialMojangMappings()"
 			'1.17.1'  | "37.0.67"    | "\"net.fabricmc:yarn:1.17.1+build.61:v2\""
 			'1.16.5'  | "36.2.4"     | "loom.officialMojangMappings()"