diff --git a/econt_sw/testing/utils/asic_signals.py b/econt_sw/testing/utils/asic_signals.py
index a4081a5..24680b8 100644
--- a/econt_sw/testing/utils/asic_signals.py
+++ b/econt_sw/testing/utils/asic_signals.py
@@ -4,6 +4,21 @@
 
 import logging
 
+
+""" function to handle loading config multiple times"""
+
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class ASICSignals:
     """
     Class for handling uhal ASIC signals
diff --git a/econt_sw/testing/utils/fast_command.py b/econt_sw/testing/utils/fast_command.py
index 6163919..83793b3 100644
--- a/econt_sw/testing/utils/fast_command.py
+++ b/econt_sw/testing/utils/fast_command.py
@@ -4,6 +4,19 @@
 
 import logging
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class FastCommands:
     """Class to handle sending fast command signals over uhal"""
 
diff --git a/econt_sw/testing/utils/io.py b/econt_sw/testing/utils/io.py
index 22e74e6..897cf72 100644
--- a/econt_sw/testing/utils/io.py
+++ b/econt_sw/testing/utils/io.py
@@ -5,6 +5,19 @@
 
 import logging
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class IOBlock:
     """ Class to handle IO blocks via uhal """
 
diff --git a/econt_sw/testing/utils/link_capture.py b/econt_sw/testing/utils/link_capture.py
index d13bdb1..05b85f5 100644
--- a/econt_sw/testing/utils/link_capture.py
+++ b/econt_sw/testing/utils/link_capture.py
@@ -5,6 +5,19 @@
 
 import logging
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class LinkCapture:
     """Class to handle multiple link captures (lcs) over uhal. Always needs the link-capture name."""
 
diff --git a/econt_sw/testing/utils/pll_lock_count.py b/econt_sw/testing/utils/pll_lock_count.py
index d5d3203..d07229f 100644
--- a/econt_sw/testing/utils/pll_lock_count.py
+++ b/econt_sw/testing/utils/pll_lock_count.py
@@ -7,6 +7,19 @@
 logger.setLevel(logging.INFO)
 from time import sleep
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class PLLLockCount:
     """Class to monitor PLL_LOCK_B transition counters on FPGA"""
 
diff --git a/econt_sw/testing/utils/stream_compare.py b/econt_sw/testing/utils/stream_compare.py
index 2c39801..788e819 100644
--- a/econt_sw/testing/utils/stream_compare.py
+++ b/econt_sw/testing/utils/stream_compare.py
@@ -6,6 +6,19 @@
 
 import logging
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class StreamCompare():
     """Class to handle stream compare via uhal"""
     def __init__(self,logLevel="",logLevelLogger=10):
diff --git a/econt_sw/testing/utils/test_vectors.py b/econt_sw/testing/utils/test_vectors.py
index d71265c..1ace47a 100644
--- a/econt_sw/testing/utils/test_vectors.py
+++ b/econt_sw/testing/utils/test_vectors.py
@@ -6,6 +6,19 @@
 
 import logging
 
+""" Function to prevent initializing over and over """
+def singleton(class_instance):
+    instances = {}
+
+    def get_instance(*args, **kwargs):
+        key = (class_instance, tuple(args), tuple(kwargs.items()))
+        if key not in instances:
+            instances[key] = class_instance(*args, **kwargs)
+        return instances[key]
+
+    return get_instance
+
+@singleton
 class TestVectors():
     """ Class to handle test vectors """
     def __init__(self,tv='testvectors',logLevel="",logLevelLogger=20):