diff --git a/build.json b/build.json
index 8838d3a6301c58829a52aa7d61954ba84780cca6..ff992b916e24e9517ea08199c61d0ff0069981f1 100644
--- a/build.json
+++ b/build.json
@@ -810,6 +810,7 @@
     },
     {
       "name": "census_statistics_multiple_writers_test",
+      "flaky": true,
       "build": "test",
       "language": "c",
       "src": [
@@ -824,6 +825,7 @@
     },
     {
       "name": "census_statistics_performance_test",
+      "flaky": true,
       "build": "test",
       "language": "c",
       "src": [
@@ -838,6 +840,7 @@
     },
     {
       "name": "census_statistics_quick_test",
+      "flaky": true,
       "build": "test",
       "language": "c",
       "src": [
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index c1bd1559ca6158329311ee5615b2b94450283925..68b22d731186fa4f1a566d4c8cbd0a87c8bd1143 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -65,7 +65,7 @@
     ]
   }, 
   {
-    "flaky": false, 
+    "flaky": true, 
     "language": "c", 
     "name": "census_statistics_multiple_writers_test", 
     "platforms": [
@@ -74,7 +74,7 @@
     ]
   }, 
   {
-    "flaky": false, 
+    "flaky": true, 
     "language": "c", 
     "name": "census_statistics_performance_test", 
     "platforms": [
@@ -83,7 +83,7 @@
     ]
   }, 
   {
-    "flaky": false, 
+    "flaky": true, 
     "language": "c", 
     "name": "census_statistics_quick_test", 
     "platforms": [