diff --git a/data-node/src/main/java/org/graylog/datanode/management/Environment.java b/data-node/src/main/java/org/graylog/datanode/management/Environment.java
index 361e98f4a7..7a67ecf638 100644
--- a/data-node/src/main/java/org/graylog/datanode/management/Environment.java
+++ b/data-node/src/main/java/org/graylog/datanode/management/Environment.java
@@ -41,7 +41,7 @@ public class Environment {
 
     public Map<String, String> getEnv() {
         Map<String, String> env = new HashMap<>();
-        env.putAll(cleanEnvironment(env));
+        env.putAll(cleanEnvironment(this.env));
         env.putAll(additionalVariables);
         return Collections.unmodifiableMap(env);
     }
diff --git a/data-node/src/test/java/org/graylog/datanode/management/EnvironmentTest.java b/data-node/src/test/java/org/graylog/datanode/management/EnvironmentTest.java
index 11ff2f5829..59d821ff22 100644
--- a/data-node/src/test/java/org/graylog/datanode/management/EnvironmentTest.java
+++ b/data-node/src/test/java/org/graylog/datanode/management/EnvironmentTest.java
@@ -29,6 +29,7 @@ class EnvironmentTest {
     void testFiltering() {
         final Environment env = new Environment(Map.of("USER", "test", "JAVA_HOME", "/path/to/jre"));
         Assertions.assertThat(env.getEnv())
-                 .doesNotContainKey("JAVA_HOME");
+                 .doesNotContainKey("JAVA_HOME")
+                .containsKey("USER");
     }
 }