diff --git a/Iceberg-Tests.package/IceWithRemoteAndUnknownCommitFixture.class/instance/setUp.st b/Iceberg-Tests.package/IceWithRemoteAndUnknownCommitFixture.class/instance/setUp.st
index 15aff16e9b..6f2efea09a 100644
--- a/Iceberg-Tests.package/IceWithRemoteAndUnknownCommitFixture.class/instance/setUp.st
+++ b/Iceberg-Tests.package/IceWithRemoteAndUnknownCommitFixture.class/instance/setUp.st
@@ -3,4 +3,4 @@ setUp
 	super setUp.
 
 	"Set a commit that is known in the remote repository but not in the local one"
-	self repository workingCopy referenceCommit: (self repository lookupCommit: remoteRepository headCommit id)
\ No newline at end of file
+	(self repository lookupCommit: remoteRepository headCommit id) adopt
\ No newline at end of file
diff --git a/Iceberg.package/IceUnknownCommit.class/instance/adopt.st b/Iceberg.package/IceUnknownCommit.class/instance/adopt.st
new file mode 100644
index 0000000000..c1adc0aaf4
--- /dev/null
+++ b/Iceberg.package/IceUnknownCommit.class/instance/adopt.st
@@ -0,0 +1,7 @@
+API-working copy
+adopt
+	
+	"Low level.
+	For the working copy to adopt myself as reference commit"
+	
+	self repository workingCopy adoptCommit: self
\ No newline at end of file