diff --git a/tests/test_core/test_core_project.py b/tests/test_core/test_core_project.py
index 61c2d25f..09f6bbb8 100644
--- a/tests/test_core/test_core_project.py
+++ b/tests/test_core/test_core_project.py
@@ -859,12 +859,12 @@ def testCoreProject_Methods(monkeypatch, nwMinimal, dummyGUI, tmpDir):
 
     # Session stats
     monkeypatch.setattr("os.path.isdir", lambda *args, **kwargs: False)
-    assert not theProject._appendSessionStats()
+    assert not theProject._appendSessionStats(idleTime=0)
     monkeypatch.undo()
 
     # Block open
     monkeypatch.setattr("builtins.open", causeOSError)
-    assert not theProject._appendSessionStats()
+    assert not theProject._appendSessionStats(idleTime=0)
     monkeypatch.undo()
 
     # Write entry
@@ -876,13 +876,13 @@ def testCoreProject_Methods(monkeypatch, nwMinimal, dummyGUI, tmpDir):
     theProject.notesWCount = 100
 
     monkeypatch.setattr("nw.core.project.time", lambda: 1600005600)
-    assert theProject._appendSessionStats()
+    assert theProject._appendSessionStats(idleTime=99)
     monkeypatch.undo()
 
     assert readFile(statsFile) == (
         "# Offset 100\n"
-        "# Start Time         End Time                Novel     Notes\n"
-        "%s  %s       200       100\n"
+        "# Start Time         End Time                Novel     Notes      Idle\n"
+        "%s  %s       200       100        99\n"
     ) % (formatTimeStamp(1600002000), formatTimeStamp(1600005600))
 
     # Pack XML Value
diff --git a/tests/test_gui/test_gui_writingstats.py b/tests/test_gui/test_gui_writingstats.py
index ab86e0d4..15696571 100644
--- a/tests/test_gui/test_gui_writingstats.py
+++ b/tests/test_gui/test_gui_writingstats.py
@@ -72,7 +72,7 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
     # Make a test log file
     writeFile(sessFile, (
         "# Offset 123\n"
-        "# Start Time         End Time                Novel     Notes\n"
+        "# Start Time         End Time                Novel     Notes      Idle\n"
         "2020-01-01 21:00:00  2020-01-01 21:00:05         6         0\n"
         "2020-01-03 21:00:00  2020-01-03 21:00:15       125         0\n"
         "2020-01-03 21:30:00  2020-01-03 21:30:15       125         5\n"
@@ -86,8 +86,8 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
     # Make sure a faulty file can still be read
     writeFile(sessFile, (
         "# Offset abc123\n"
-        "# Start Time         End Time                Novel     Notes\n"
-        "2020-01-01 21:00:00  2020-01-01 21:00:05         6         0\n"
+        "# Start Time         End Time                Novel     Notes      Idle\n"
+        "2020-01-01 21:00:00  2020-01-01 21:00:05         6         0        50\n"
         "2020-01-03 21:00:00  2020-01-03 21:00:15       125         0\n"
         "2020-01-03 21:30:00  2020-01-03 21:30:15       125         5\n"
         "2020-01-06 21:00:00  2020-01-06 21:00:10       125\n"
@@ -100,8 +100,8 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
     # ==============
 
     writeFile(sessFile, (
-        "# Start Time         End Time                Novel     Notes\n"
-        "2020-01-01 21:00:00  2020-01-01 21:00:05         6         0\n"
+        "# Start Time         End Time                Novel     Notes      Idle\n"
+        "2020-01-01 21:00:00  2020-01-01 21:00:05         6         0        50\n"
         "2020-01-03 21:00:00  2020-01-03 21:00:15       125         0\n"
         "2020-01-03 21:30:00  2020-01-03 21:30:15       125         5\n"
         "2020-01-06 21:00:00  2020-01-06 21:00:10       125         5\n"
@@ -133,10 +133,17 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
         jsonData = json.load(inFile)
 
     assert len(jsonData) == 4
+    assert jsonData[0]["length"] >= 4.0
+    assert jsonData[0]["newWords"] == 6
+    assert jsonData[0]["novelWords"] == 6
+    assert jsonData[0]["noteWords"] == 0
+    assert jsonData[0]["idleTime"] == 50
+
     assert jsonData[1]["length"] >= 14.0
     assert jsonData[1]["newWords"] == 119
     assert jsonData[1]["novelWords"] == 125
     assert jsonData[1]["noteWords"] == 0
+    assert jsonData[1]["idleTime"] == 0
 
     # Test Filters
     # ============
@@ -160,6 +167,7 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
     assert jsonData[0]["newWords"] == 5
     assert jsonData[0]["novelWords"] == 125
     assert jsonData[0]["noteWords"] == 5
+    assert jsonData[0]["idleTime"] == 0
 
     # No Note Files
     qtbot.mouseClick(sessLog.incNovel, Qt.LeftButton)
@@ -177,6 +185,7 @@ def testGuiWritingStats_Dialog(qtbot, monkeypatch, nwGUI, fncDir, fncProj):
     assert jsonData[1]["newWords"] == 119
     assert jsonData[1]["novelWords"] == 125
     assert jsonData[1]["noteWords"] == 0
+    assert jsonData[1]["idleTime"] == 0
 
     # No Negative Entries
     qtbot.mouseClick(sessLog.incNotes, Qt.LeftButton)