diff --git a/gradle/defaults.gradle b/gradle/defaults.gradle
index 1b534c41ffb..1b676fe3a57 100644
--- a/gradle/defaults.gradle
+++ b/gradle/defaults.gradle
@@ -6,7 +6,6 @@ allprojects {
   // Repositories to fetch dependencies from.
   repositories {
     mavenCentral()
-
     maven {
       url "https://maven.restlet.com"
     }
diff --git a/gradle/testing/defaults-tests.gradle b/gradle/testing/defaults-tests.gradle
index f42bdba789c..8f8c977ae59 100644
--- a/gradle/testing/defaults-tests.gradle
+++ b/gradle/testing/defaults-tests.gradle
@@ -59,6 +59,10 @@ allprojects {
       // Turn jenkins blood red for hashmap bugs, even on jdk7
       systemProperty 'jdk.map.althashing.threshold', '0'
 
+      // Pass these to RandomizedRunner so that it doesn't attempt to set them.
+      systemProperty 'junit4.childvm.count', '1'
+      systemProperty 'junit4.childvm.id', '0'
+
       // Set up cwd and temp locations.
       systemProperty("java.io.tmpdir", testsTmpDir)
       systemProperty("tempDir", testsTmpDir)
diff --git a/versions.lock b/versions.lock
index be4c5eb7f04..0dc5c2a16dd 100644
--- a/versions.lock
+++ b/versions.lock
@@ -2,7 +2,7 @@
 com.adobe.xmp:xmpcore:5.1.3 (1 constraints: 0b050a36)
 com.beust:jcommander:1.35 (1 constraints: b50c1901)
 com.carrotsearch:hppc:0.8.1 (2 constraints: af0fd8a6)
-com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.2 (1 constraints: 0d050c36)
+com.carrotsearch.randomizedtesting:randomizedtesting-runner:2.7.5 (1 constraints: 10050f36)
 com.carrotsearch.thirdparty:simple-xml-safe:2.7.1 (1 constraints: a60a82ca)
 com.cybozu.labs:langdetect:1.1-20120112 (1 constraints: 5c066d5e)
 com.drewnoakes:metadata-extractor:2.11.0 (1 constraints: 3605323b)
diff --git a/versions.props b/versions.props
index 94f74db7e81..905c6190a10 100644
--- a/versions.props
+++ b/versions.props
@@ -1,5 +1,5 @@
 com.adobe.xmp:xmpcore=5.1.3
-com.carrotsearch.randomizedtesting:*=2.7.2
+com.carrotsearch.randomizedtesting:*=2.7.5
 com.carrotsearch:hppc=0.8.1
 com.cybozu.labs:langdetect=1.1-20120112
 com.drewnoakes:metadata-extractor=2.11.0