diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1f78b4c87..2256a2f1c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,8 +11,8 @@ test:
       - .gradle/caches
 
   script:
-    - ./gradlew --no-daemon animalSnifferMain animalSnifferTest
-    - ./gradlew --no-daemon test
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom animalSnifferMain animalSnifferTest
+    - ./gradlew --no-daemon -Djava.security.egd=file:/dev/urandom test
 
   after_script:
     # these file change every time but should not be cached
diff --git a/bramble-android/build.gradle b/bramble-android/build.gradle
index 09129b5a6..56e36842b 100644
--- a/bramble-android/build.gradle
+++ b/bramble-android/build.gradle
@@ -55,3 +55,8 @@ project.afterEvaluate {
 		into 'src/main/res/raw'
 	}
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}
diff --git a/bramble-api/build.gradle b/bramble-api/build.gradle
index fc1634e8c..520d5bf88 100644
--- a/bramble-api/build.gradle
+++ b/bramble-api/build.gradle
@@ -31,3 +31,8 @@ task jarTest(type: Jar, dependsOn: testClasses) {
 artifacts {
 	testOutput jarTest
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}
diff --git a/bramble-core/build.gradle b/bramble-core/build.gradle
index 1a5e234b9..eec6c4387 100644
--- a/bramble-core/build.gradle
+++ b/bramble-core/build.gradle
@@ -44,3 +44,8 @@ task jarTest(type: Jar, dependsOn: testClasses) {
 artifacts {
 	testOutput jarTest
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}
diff --git a/bramble-j2se/build.gradle b/bramble-j2se/build.gradle
index 405795bb4..e77258601 100644
--- a/bramble-j2se/build.gradle
+++ b/bramble-j2se/build.gradle
@@ -26,5 +26,7 @@ dependencies {
 }
 
 tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
 	systemProperty 'java.library.path', 'libs'
 }
diff --git a/briar-android/build.gradle b/briar-android/build.gradle
index 152fe1708..d5836587d 100644
--- a/briar-android/build.gradle
+++ b/briar-android/build.gradle
@@ -186,4 +186,7 @@ project.afterEvaluate {
 	preBuild.dependsOn.add(verifyTranslations)
 }
 
-
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}
diff --git a/briar-api/build.gradle b/briar-api/build.gradle
index 6331e5edd..e5f288e55 100644
--- a/briar-api/build.gradle
+++ b/briar-api/build.gradle
@@ -11,3 +11,8 @@ dependencies {
 
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}
diff --git a/briar-core/build.gradle b/briar-core/build.gradle
index f3fad0cba..6fb4231dc 100644
--- a/briar-core/build.gradle
+++ b/briar-core/build.gradle
@@ -32,3 +32,8 @@ dependencies {
 
 	signature 'org.codehaus.mojo.signature:java16:1.1@signature'
 }
+
+tasks.withType(Test) {
+	// Use entropy-gathering device specified on command line, if any
+	systemProperty 'java.security.egd', System.getProperty('java.security.egd')
+}