diff --git a/bin/tests/system/isctest/vars/dirs.py b/bin/tests/system/isctest/vars/dirs.py
index 1ec52b69f7..88e8a81c8c 100644
--- a/bin/tests/system/isctest/vars/dirs.py
+++ b/bin/tests/system/isctest/vars/dirs.py
@@ -20,6 +20,7 @@ from .build import BUILD_VARS, SYSTEM_TEST_DIR_GIT_PATH  # type: ignore
 DIR_VARS = {
     "builddir": f"{BUILD_VARS['TOP_BUILDDIR']}/{SYSTEM_TEST_DIR_GIT_PATH}",
     "srcdir": f"{BUILD_VARS['TOP_SRCDIR']}/{SYSTEM_TEST_DIR_GIT_PATH}",
+    "HYPOTHESIS_STORAGE_DIRECTORY": f"{BUILD_VARS['TOP_BUILDDIR']}/{SYSTEM_TEST_DIR_GIT_PATH}/.hypothesis",
     "SYSTESTDIR": None,
 }