about summary refs log tree commit diff
path: root/absl/random/exponential_distribution_test.cc
diff options
context:
space:
mode:
Diffstat (limited to 'absl/random/exponential_distribution_test.cc')
-rw-r--r--absl/random/exponential_distribution_test.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/absl/random/exponential_distribution_test.cc b/absl/random/exponential_distribution_test.cc
index f3cfd76442c4..8e9e69b64b29 100644
--- a/absl/random/exponential_distribution_test.cc
+++ b/absl/random/exponential_distribution_test.cc
@@ -32,6 +32,7 @@
 #include "absl/base/macros.h"
 #include "absl/random/internal/chi_square.h"
 #include "absl/random/internal/distribution_test_util.h"
+#include "absl/random/internal/pcg_engine.h"
 #include "absl/random/internal/sequence_urbg.h"
 #include "absl/random/random.h"
 #include "absl/strings/str_cat.h"
@@ -205,7 +206,10 @@ class ExponentialDistributionTests : public testing::TestWithParam<Param>,
   template <typename D>
   double SingleChiSquaredTest();
 
-  absl::InsecureBitGen rng_;
+  // We use a fixed bit generator for distribution accuracy tests.  This allows
+  // these tests to be deterministic, while still testing the qualify of the
+  // implementation.
+  absl::random_internal::pcg64_2018_engine rng_{0x2B7E151628AED2A6};
 };
 
 template <typename D>