diff --git a/test_suite/FGTestApi/CMakeLists.txt b/test_suite/FGTestApi/CMakeLists.txt
index a68aeb00c..045ba7dde 100644
--- a/test_suite/FGTestApi/CMakeLists.txt
+++ b/test_suite/FGTestApi/CMakeLists.txt
@@ -1,6 +1,7 @@
 set(TESTSUITE_SOURCES
     ${TESTSUITE_SOURCES}
     ${CMAKE_CURRENT_SOURCE_DIR}/globals.cxx
+    ${CMAKE_CURRENT_SOURCE_DIR}/NavDataCache.cxx
     ${CMAKE_CURRENT_SOURCE_DIR}/PrivateAccessorFDM.cxx
     ${CMAKE_CURRENT_SOURCE_DIR}/scene_graph.cxx
     PARENT_SCOPE
@@ -10,6 +11,7 @@ set(TESTSUITE_SOURCES
 set(TESTSUITE_HEADERS
     ${TESTSUITE_HEADERS}
     ${CMAKE_CURRENT_SOURCE_DIR}/globals.hxx
+    ${CMAKE_CURRENT_SOURCE_DIR}/NavDataCache.hxx
     ${CMAKE_CURRENT_SOURCE_DIR}/PrivateAccessorFDM.hxx
     ${CMAKE_CURRENT_SOURCE_DIR}/scene_graph.hxx
     PARENT_SCOPE
diff --git a/test_suite/FGTestApi/NavDataCache.cxx b/test_suite/FGTestApi/NavDataCache.cxx
new file mode 100644
index 000000000..d29161c64
--- /dev/null
+++ b/test_suite/FGTestApi/NavDataCache.cxx
@@ -0,0 +1,25 @@
+#include "NavDataCache.hxx"
+
+#include <Navaids/NavDataCache.hxx>
+
+
+namespace FGTestApi {
+
+namespace setUp {
+
+void initNavDataCache()
+{
+    flightgear::NavDataCache* cache = flightgear::NavDataCache::createInstance();
+    if (cache->isRebuildRequired()) {
+        std::cerr << "Navcache rebuild for testing" << std::flush;
+
+        while (cache->rebuild() != flightgear::NavDataCache::REBUILD_DONE) {
+          SGTimeStamp::sleepForMSec(1000);
+          std::cerr << "." << std::flush;
+        }
+    }
+}
+
+}  // End of namespace setUp.
+
+}  // End of namespace FGTestApi.
diff --git a/test_suite/FGTestApi/NavDataCache.hxx b/test_suite/FGTestApi/NavDataCache.hxx
new file mode 100644
index 000000000..c7a819281
--- /dev/null
+++ b/test_suite/FGTestApi/NavDataCache.hxx
@@ -0,0 +1,15 @@
+#ifndef FG_NAV_DATA_CACHE_TEST_HELPERS_HXX
+#define FG_NAV_DATA_CACHE_TEST_HELPERS_HXX
+
+namespace FGTestApi {
+
+namespace setUp {
+
+
+void initNavDataCache();
+
+}  // End of namespace setUp.
+
+}  // End of namespace FGTestApi.
+
+#endif // of FG_NAV_DATA_CACHE_TEST_HELPERS_HXX
diff --git a/test_suite/FGTestApi/globals.cxx b/test_suite/FGTestApi/globals.cxx
index d857ed706..42771a793 100644
--- a/test_suite/FGTestApi/globals.cxx
+++ b/test_suite/FGTestApi/globals.cxx
@@ -1,4 +1,3 @@
-
 #include "config.h"
 
 #include "test_suite/dataStore.hxx"
@@ -12,28 +11,17 @@
 #include <Main/globals.hxx>
 #include <Main/options.hxx>
 
-#include <Navaids/NavDataCache.hxx>
 #include <Time/TimeManager.hxx>
 
-#include <simgear/debug/logstream.hxx>
-#include <simgear/misc/sg_dir.hxx>
 #include <simgear/timing/timestamp.hxx>
 
-#include <iostream>
-
-static SGPath tests_fgdata;
 
 namespace FGTestApi {
 
 namespace setUp {
 
-    SGPath fgdataPath()
-    {
-        return tests_fgdata;
-    }
-
-  void initTestGlobals(const std::string& testName)
-  {
+void initTestGlobals(const std::string& testName)
+{
     globals = new FGGlobals;
 
     DataStore &data = DataStore::get();
@@ -41,40 +29,29 @@ namespace setUp {
         data.findFGRoot("");
     }
     globals->set_fg_root(data.getFGRoot());
-    tests_fgdata = data.getFGRoot();
 
-      // current dir
-      SGPath homePath = SGPath::fromUtf8(FGBUILDDIR) / "test_home";
-      if (!homePath.exists()) {
-          (homePath / "dummyFile").create_dir(0755);
-      }
+    // current dir
+    SGPath homePath = SGPath::fromUtf8(FGBUILDDIR) / "test_home";
+    if (!homePath.exists()) {
+        (homePath / "dummyFile").create_dir(0755);
+    }
 
-      globals->set_fg_home(homePath);
+    globals->set_fg_home(homePath);
 
-      fgSetDefaults();
+    fgSetDefaults();
 
-      flightgear::NavDataCache* cache = flightgear::NavDataCache::createInstance();
-      if (cache->isRebuildRequired()) {
-          std::cerr << "Navcache rebuild for testing" << std::flush;
-
-          while (cache->rebuild() != flightgear::NavDataCache::REBUILD_DONE) {
-            SGTimeStamp::sleepForMSec(1000);
-            std::cerr << "." << std::flush;
-          }
-      }
-
-      std::unique_ptr<TimeManager> t;
-      t.reset(new TimeManager);
-      t->init(); // establish mag-var data
-  }
+    std::unique_ptr<TimeManager> t;
+    t.reset(new TimeManager);
+    t->init(); // establish mag-var data
+}
 
 }  // End of namespace setUp.
 
 
 namespace tearDown {
 
-  void shutdownTestGlobals()
-  {
+void shutdownTestGlobals()
+{
     // The QApplication instance must be destroyed before exit() begins, see
     // <https://bugreports.qt.io/browse/QTBUG-48709> (otherwise, segfault).
 #if defined(HAVE_QT) && !defined(FG_TESTLIB)
@@ -82,7 +59,7 @@ namespace tearDown {
 #endif
 
     delete globals;
-  }
+}
 
 }  // End of namespace tearDown.
 
diff --git a/test_suite/FGTestApi/globals.hxx b/test_suite/FGTestApi/globals.hxx
index 92dfc0603..14ae13dbf 100644
--- a/test_suite/FGTestApi/globals.hxx
+++ b/test_suite/FGTestApi/globals.hxx
@@ -1,8 +1,7 @@
-#ifndef FG_TEST_HELPERS_HXX
-#define FG_TEST_HELPERS_HXX
+#ifndef FG_TEST_GLOBALS_HELPERS_HXX
+#define FG_TEST_GLOBALS_HELPERS_HXX
 
 #include <string>
-#include <simgear/misc/sg_path.hxx>
 
 namespace FGTestApi {
 
@@ -10,8 +9,6 @@ namespace setUp {
 
 void initTestGlobals(const std::string& testName);
 
-SGPath fgdataPath();
-
 }  // End of namespace setUp.
 
 
@@ -23,4 +20,4 @@ void shutdownTestGlobals();
 
 }  // End of namespace FGTestApi.
 
-#endif // of FG_TEST_HELPERS_HXX
+#endif // of FG_TEST_GLOBALS_HELPERS_HXX
diff --git a/test_suite/unit_tests/Main/test_posinit.cxx b/test_suite/unit_tests/Main/test_posinit.cxx
index d653df469..cbe56f21b 100644
--- a/test_suite/unit_tests/Main/test_posinit.cxx
+++ b/test_suite/unit_tests/Main/test_posinit.cxx
@@ -19,6 +19,7 @@
 #include "test_posinit.hxx"
 
 #include "test_suite/FGTestApi/globals.hxx"
+#include "test_suite/FGTestApi/NavDataCache.hxx"
 
 #include <simgear/props/props_io.hxx>
 
@@ -31,13 +32,23 @@
 
 using namespace flightgear;
 
-void PosInitTests::testDefaultStartup()
+void PosInitTests::setUp()
 {
     FGTestApi::setUp::initTestGlobals("posinit");
+    FGTestApi::setUp::initNavDataCache();
     Options::reset();
-
     fgLoadProps("defaults.xml", globals->get_props());
+}
 
+
+void PosInitTests::tearDown()
+{
+    FGTestApi::tearDown::shutdownTestGlobals();
+}
+
+
+void PosInitTests::testDefaultStartup()
+{
     {
         Options* opts = Options::sharedInstance();
         opts->setShouldLoadDefaultConfig(false);
@@ -53,7 +64,7 @@ void PosInitTests::testDefaultStartup()
     // this unfortunately means manually parsing that file, oh well
 
     {
-        SGPath presets = FGTestApi::setUp::fgdataPath() / "location-presets.xml";
+        SGPath presets = globals->get_fg_root() / "location-presets.xml";
         CPPUNIT_ASSERT(presets.exists());
         SGPropertyNode_ptr props(new SGPropertyNode);
         readProperties(presets, props);
@@ -68,16 +79,10 @@ void PosInitTests::testDefaultStartup()
         double dist = SGGeodesy::distanceM(pos, defaultAirport->geod());
         CPPUNIT_ASSERT(dist < 10000);
     }
-    FGTestApi::tearDown::shutdownTestGlobals();
-
 }
 
 void PosInitTests::testAirportOnlyStartup()
 {
-    FGTestApi::setUp::initTestGlobals("posinit");
-    Options::reset();
-    fgLoadProps("defaults.xml", globals->get_props());
-
     {
         Options* opts = Options::sharedInstance();
         opts->setShouldLoadDefaultConfig(false);
@@ -94,17 +99,10 @@ void PosInitTests::testAirportOnlyStartup()
     double dist = SGGeodesy::distanceM(globals->get_aircraft_position(),
                                        FGAirport::getByIdent("EDDF")->geod());
     CPPUNIT_ASSERT(dist < 10000);
-    FGTestApi::tearDown::shutdownTestGlobals();
-
 }
 
 void PosInitTests::testAirportAndMetarStartup()
 {
-    FGTestApi::setUp::initTestGlobals("posinit");
-
-    Options::reset();
-    fgLoadProps("defaults.xml", globals->get_props());
-
     {
         Options* opts = Options::sharedInstance();
         opts->setShouldLoadDefaultConfig(false);
@@ -121,6 +119,4 @@ void PosInitTests::testAirportAndMetarStartup()
     CPPUNIT_ASSERT(dist < 10000);
     ///sim/atc/runway
     CPPUNIT_ASSERT(globals->get_props()->getStringValue("sim/atc/runway") == std::string("26"));
-
-    FGTestApi::tearDown::shutdownTestGlobals();
 }
diff --git a/test_suite/unit_tests/Main/test_posinit.hxx b/test_suite/unit_tests/Main/test_posinit.hxx
index 629a5f303..ff9153aaa 100644
--- a/test_suite/unit_tests/Main/test_posinit.hxx
+++ b/test_suite/unit_tests/Main/test_posinit.hxx
@@ -38,10 +38,10 @@ class PosInitTests : public CppUnit::TestFixture
 
 public:
     // Set up function for each test.
-    void setUp() {}
+    void setUp();
 
     // Clean up after each test.
-    void tearDown() {}
+    void tearDown();
 
     // The tests.
     void testAirportAndMetarStartup();
diff --git a/test_suite/unit_tests/Navaids/test_flightplan.cxx b/test_suite/unit_tests/Navaids/test_flightplan.cxx
index a8f58e8cc..cf69d0bd3 100644
--- a/test_suite/unit_tests/Navaids/test_flightplan.cxx
+++ b/test_suite/unit_tests/Navaids/test_flightplan.cxx
@@ -1,6 +1,7 @@
 #include "test_flightplan.hxx"
 
 #include "test_suite/FGTestApi/globals.hxx"
+#include "test_suite/FGTestApi/NavDataCache.hxx"
 
 #include <simgear/misc/strutils.hxx>
 
@@ -20,6 +21,7 @@ using namespace flightgear;
 void FlightplanTests::setUp()
 {
     FGTestApi::setUp::initTestGlobals("flightplan");
+    FGTestApi::setUp::initNavDataCache();
 }
 
 
diff --git a/test_suite/unit_tests/Navaids/test_navaids2.cxx b/test_suite/unit_tests/Navaids/test_navaids2.cxx
index 20d44b68f..d0f3cc380 100644
--- a/test_suite/unit_tests/Navaids/test_navaids2.cxx
+++ b/test_suite/unit_tests/Navaids/test_navaids2.cxx
@@ -1,6 +1,7 @@
 #include "test_navaids2.hxx"
 
 #include "test_suite/FGTestApi/globals.hxx"
+#include "test_suite/FGTestApi/NavDataCache.hxx"
 
 #include <Navaids/NavDataCache.hxx>
 #include <Navaids/navrecord.hxx>
@@ -11,6 +12,7 @@
 void NavaidsTests::setUp()
 {
     FGTestApi::setUp::initTestGlobals("navaids2");
+    FGTestApi::setUp::initNavDataCache();
 }