diff --git a/tests/memtest.py b/tests/memtest.py
index 907426e..e4c20c5 100755
--- a/tests/memtest.py
+++ b/tests/memtest.py
@@ -72,7 +72,8 @@ def makeTestAllCurrentTld(
 
 def check() -> None:
     # gc.set_debug(gc.DEBUG_LEAK)
-    # domains = makeTestAllCurrentTld(None)
+    gc.set_debug(gc.DEBUG_UNCOLLECTABLE)
+    domains = makeTestAllCurrentTld(None)
     n: int = 0
 
     before = defaultdict(int)
@@ -82,22 +83,36 @@ def check() -> None:
     for item in domains:
         n += 1
         print(f"Checking domain: {item}")
+        b2 = defaultdict(int)
+        for i in gc.get_objects():
+            b2[type(i)] += 1
 
         whoisdomain_call(item)
+        print(gc.collect(0)) # The number of unreachable objects found is returned.
+        print(gc.collect(1)) # The number of unreachable objects found is returned.
+        print(gc.collect(2)) # The number of unreachable objects found is returned.
+
         after = defaultdict(int)
         for i in gc.get_objects():
             after[type(i)] += 1
 
-        z = [(k, after[k] - before[k]) for k in after if after[k] - before[k]]
+        z = [(k, after[k] - before[k]) for k in after if (after[k] - before[k]) > 0]
+        for item in z:
+            print("since start", item)  #(<class 're.Pattern'>, 46) is growing to 288
+
+        z = [(k, after[k] - b2[k]) for k in after if (after[k] - b2[k]) > 0]
         for item in z:
-            print(item)
+            print("since previous", item)  #(<class 're.Pattern'>, 46) is growing to 288
+
+        n = 0
+        for item in gc.get_stats():
+            print(n, item)
+            n += 1
 
-        print(gc.collect())
-        print(gc.get_stats())
         print(gc.get_referrers())
-        # print(gc.garbage)
-        if n > 3:
-            break
+
+        for item in gc.garbage:
+            print("garbage:", item)
 
 @profile
 def whoisdomain_call(domain: str) -> None:
diff --git a/whoisdomain/whoisCliInterface.py b/whoisdomain/whoisCliInterface.py
index b5f5425..02bbe55 100755
--- a/whoisdomain/whoisCliInterface.py
+++ b/whoisdomain/whoisCliInterface.py
@@ -125,6 +125,8 @@ def _runWhoisCliOnThisOs(self) -> str:
         # LANG=en is added to make the ".jp" output consisent across all environments
         # STDBUF_OFF_CMD needed to not lose data on kill
 
+        s: string = ""
+
         with subprocess.Popen(
             self.STDBUF_OFF_CMD + self._makeWhoisCommandToRun(),
             stdout=subprocess.PIPE,
@@ -151,7 +153,10 @@ def _runWhoisCliOnThisOs(self) -> str:
                     msg = f"timeout: query took more then {self.pc.timeout} seconds"
                     raise WhoisCommandTimeout(msg) from ex
 
-            return self._postProcessingResult()
+            s = self._postProcessingResult()
+
+        self.processHandle = None
+        return s
 
     def _returnWhoisPythonFromStaticTestData(self) -> str:
         testDir = os.getenv("TEST_WHOIS_PYTHON")