diff --git a/tests/unit/unittest/symbolindexer-test.cpp b/tests/unit/unittest/symbolindexer-test.cpp
index 8940442ce4f..09088ec637e 100644
--- a/tests/unit/unittest/symbolindexer-test.cpp
+++ b/tests/unit/unittest/symbolindexer-test.cpp
@@ -57,7 +57,11 @@ using ClangBackEnd::SymbolType;
 class SymbolIndexer : public testing::Test
 {
 protected:
-    void SetUp();
+    void SetUp()
+    {
+        ON_CALL(mockCollector, symbols()).WillByDefault(ReturnRef(symbolEntries));
+        ON_CALL(mockCollector, sourceLocations()).WillByDefault(ReturnRef(sourceLocations));
+    }
 
 protected:
     PathString main1Path = TESTDATA_DIR "/includecollector_main3.cpp";
@@ -163,11 +167,5 @@ TEST_F(SymbolIndexer, UpdateProjectPartsCallsInOrder)
     indexer.updateProjectParts({projectPart1}, Utils::clone(unsaved));
 }
 
-void SymbolIndexer::SetUp()
-{
-    ON_CALL(mockCollector, symbols()).WillByDefault(ReturnRef(symbolEntries));
-    ON_CALL(mockCollector, sourceLocations()).WillByDefault(ReturnRef(sourceLocations));
-}
 
 }
-