diff --git a/examples/PikaMath/Quaternion_test.py b/examples/PikaMath/Quaternion_test.py
index 72fd1ad10..975c2361c 100644
--- a/examples/PikaMath/Quaternion_test.py
+++ b/examples/PikaMath/Quaternion_test.py
@@ -1,4 +1,4 @@
-import PikaMath
+from PikaMath import Quaternion
 
 a=Quaternion()
 a.set(0.592,0.158,0.592,0.525)
diff --git a/port/linux/.vscode/launch.json b/port/linux/.vscode/launch.json
index 5f1120894..8fece995c 100644
--- a/port/linux/.vscode/launch.json
+++ b/port/linux/.vscode/launch.json
@@ -11,7 +11,7 @@
             "program": "${workspaceFolder}/build/test/pikascript_test",
             // "program": "${workspaceFolder}/build/boot/demo06-pikamain/pikascript_demo06-pikamain",
             "args": [
-                // "--gtest_filter=pikaMain.unitTest"
+                "--gtest_filter=PikaMath.*"
             ],
             "stopAtEntry": false,
             "cwd": "${workspaceFolder}",
diff --git a/port/linux/test/python/PikaMath/Quaternion_test.py b/port/linux/test/python/PikaMath/Quaternion_test.py
index 72fd1ad10..975c2361c 100644
--- a/port/linux/test/python/PikaMath/Quaternion_test.py
+++ b/port/linux/test/python/PikaMath/Quaternion_test.py
@@ -1,4 +1,4 @@
-import PikaMath
+from PikaMath import Quaternion
 
 a=Quaternion()
 a.set(0.592,0.158,0.592,0.525)