diff --git a/src/modules/partition/tests/PartitionJobTests.cpp b/src/modules/partition/tests/PartitionJobTests.cpp
index 60e72e006..2b0b1a1dc 100644
--- a/src/modules/partition/tests/PartitionJobTests.cpp
+++ b/src/modules/partition/tests/PartitionJobTests.cpp
@@ -156,7 +156,7 @@ QueueRunner::onFailed( const QString& message, const QString& details )
     QFAIL( qPrintable( msg ) );
 }
 
-CalamaresUtils::Partition::KPMManager* kpmcore = nullptr;
+static CalamaresUtils::Partition::KPMManager* kpmcore = nullptr;
 
 //- PartitionJobTests ------------------------------------------------------------------
 PartitionJobTests::PartitionJobTests()