diff --git a/tests/helper/src/java/com/android/microdroid/test/common/ProcessUtil.java b/tests/helper/src/java/com/android/microdroid/test/common/ProcessUtil.java
index d85929d..940ec9c 100644
--- a/tests/helper/src/java/com/android/microdroid/test/common/ProcessUtil.java
+++ b/tests/helper/src/java/com/android/microdroid/test/common/ProcessUtil.java
@@ -99,12 +99,14 @@
             if (line.length() == 0) {
                 continue;
             }
-            if (line.contains(": ")) {
+            // Each line is '<metrics>:        <number> kB'.
+            // EX : Pss_Anon:        70712 kB
+            // EX : Active(file):     5792 kB
+            // EX : ProtectionKey:       0
+            if (line.matches("[\\w()]+:\\s+.*")) {
                 if (entries.size() == 0) {
                     throw new RuntimeException("unexpected line: " + line);
                 }
-                // Each line is '<metrics>:        <number> kB'.
-                // EX : Pss_Anon:        70712 kB
                 if (line.endsWith(" kB")) line = line.substring(0, line.length() - 3);
                 String[] elems = line.split(":");
                 String name = elems[0].trim();