diff --git a/src/test/prevector_tests.cpp b/src/test/prevector_tests.cpp
--- a/src/test/prevector_tests.cpp
+++ b/src/test/prevector_tests.cpp
@@ -182,8 +182,8 @@
 
     prevector_tester() {
         SeedInsecureRand();
-        rand_seed = insecure_rand_seed;
-        rand_cache = insecure_rand_ctx;
+        rand_seed = InsecureRand256();
+        rand_cache = FastRandomContext(rand_seed);
     }
 };
 
diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
--- a/src/test/test_bitcoin.h
+++ b/src/test/test_bitcoin.h
@@ -22,16 +22,10 @@
  */
 #define NULLPTR(T) static_cast<T *>(nullptr)
 
-extern uint256 insecure_rand_seed;
 extern FastRandomContext insecure_rand_ctx;
 
-static inline void SeedInsecureRand(bool fDeterministic = false) {
-    if (fDeterministic) {
-        insecure_rand_seed = uint256();
-    } else {
-        insecure_rand_seed = GetRandHash();
-    }
-    insecure_rand_ctx = FastRandomContext(insecure_rand_seed);
+static inline void SeedInsecureRand(bool deterministic = false) {
+    insecure_rand_ctx = FastRandomContext(deterministic);
 }
 
 static inline uint32_t insecure_rand() {
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -45,8 +45,7 @@
     g_connman->vNodes.clear();
 }
 
-uint256 insecure_rand_seed = GetRandHash();
-FastRandomContext insecure_rand_ctx(insecure_rand_seed);
+FastRandomContext insecure_rand_ctx;
 
 extern void noui_connect();