diff --git a/test/apps/cli/unit/conftest.py b/test/apps/cli/unit/conftest.py
index c87a930..3752ac0 100644
--- a/test/apps/cli/unit/conftest.py
+++ b/test/apps/cli/unit/conftest.py
@@ -1,6 +1,12 @@
+import pytest
 import random
 
 
+@pytest.fixture(scope="session", autouse=True)
+def prng_seed():
+    random.seed(0)
+
+
 def get_random_value_hex(nbytes):
     pseudo_random_value = random.getrandbits(8 * nbytes)
     prv_hex = "{:x}".format(pseudo_random_value)
diff --git a/test/common/unit/conftest.py b/test/common/unit/conftest.py
index c87a930..3752ac0 100644
--- a/test/common/unit/conftest.py
+++ b/test/common/unit/conftest.py
@@ -1,6 +1,12 @@
+import pytest
 import random
 
 
+@pytest.fixture(scope="session", autouse=True)
+def prng_seed():
+    random.seed(0)
+
+
 def get_random_value_hex(nbytes):
     pseudo_random_value = random.getrandbits(8 * nbytes)
     prv_hex = "{:x}".format(pseudo_random_value)