diff --git a/core/tests/Variable/TestVariable.cpp b/core/tests/Variable/TestVariable.cpp
index 7511a24..e3389e8 100644
--- a/core/tests/Variable/TestVariable.cpp
+++ b/core/tests/Variable/TestVariable.cpp
@@ -302,7 +302,7 @@ void TestVariable::testNbPoints_data()
 
     // Doubles cache but don't add data series (expected nb points don't change)
     cacheRange = SqpRange{date(2017, 1, 1, 12, 0, 0), date(2017, 1, 1, 12, 0, 19)};
-    operations.push_back({cacheRange, nullptr, 20});
+    operations.push_back({cacheRange, dataSeries(INVALID_RANGE), 20});
 
     // Doubles cache and data series (expected nb points change)
     cacheRange = SqpRange{date(2017, 1, 1, 12, 0, 0), date(2017, 1, 1, 12, 0, 19)};
@@ -310,7 +310,7 @@ void TestVariable::testNbPoints_data()
 
     // Decreases cache (expected nb points decreases as the series is purged)
     cacheRange = SqpRange{date(2017, 1, 1, 12, 0, 5), date(2017, 1, 1, 12, 0, 9)};
-    operations.push_back({cacheRange, nullptr, 10});
+    operations.push_back({cacheRange, dataSeries(INVALID_RANGE), 10});
 
     QTest::newRow("nbPoints1") << operations;
 }