diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc15_12.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc15_12.java
index acde3a1..0b0405a 100755
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc15_12.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc15_12.java
@@ -27,6 +27,6 @@
         AdbUtils.runCommandLine("logcat -c" , getDevice());
         AdbUtils.runPoc("CVE-2015-6626", getDevice(), 60);
         String logcat =  AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Media buffer information leak[\\s\\n\\S]*", logcat);
+        assertNotMatchesMultiLine("Media buffer information leak", logcat);
     }
 }
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_04.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_04.java
index 4527c0c..9a7e62a 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_04.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_04.java
@@ -28,7 +28,7 @@
         AdbUtils.runCommandLine("logcat -c" , getDevice());
         AdbUtils.runPoc("CVE-2016-2419", getDevice(), 60);
         String logcat = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*IOMX_InfoLeak b26323455[\\s\\n\\S]*", logcat);
+        assertNotMatchesMultiLine("IOMX_InfoLeak b26323455", logcat);
     }
 
     /**
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_05.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_05.java
index c5bb8a0..b8519d6 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_05.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_05.java
@@ -29,7 +29,7 @@
         AdbUtils.runPoc("CVE-2016-2460", getDevice(), 60);
 
         String logcat =  AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*IGraphicBufferProducer_Info is Leaked[\\s\\n\\S]*", logcat);
+        assertNotMatchesMultiLine("IGraphicBufferProducer_Info is Leaked", logcat);
     }
 
     /**
@@ -40,9 +40,9 @@
         AdbUtils.runCommandLine("logcat -c", getDevice());
         AdbUtils.runPoc("CVE-2016-2451", getDevice(), 60);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
     /**
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_11.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_11.java
index 8d12acb..0927806 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_11.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_11.java
@@ -39,7 +39,7 @@
         AdbUtils.runCommandLine("logcat -c", getDevice());
         AdbUtils.runPoc("CVE-2012-6702", getDevice(), 60);
         String logcat = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*fail: encountered same random values![\\s\\n\\S]*", logcat);
+        assertNotMatchesMultiLine("fail: encountered same random values!", logcat);
     }
 
     /**
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_12.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_12.java
index ef91d70..1d44a9e 100755
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc16_12.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc16_12.java
@@ -33,9 +33,9 @@
         //Sleep to allow PoC to hit.
         Thread.sleep(30000);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
      /**
@@ -46,9 +46,9 @@
         AdbUtils.runCommandLine("logcat -c", getDevice());
         AdbUtils.runPocNoOutput("CVE-2016-6759", getDevice(), 60);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
     /**
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_01.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_01.java
index e1851c4..889bd7d 100755
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_01.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_01.java
@@ -122,9 +122,9 @@
         AdbUtils.runCommandLine("logcat -c" , getDevice());
         AdbUtils.runPocNoOutput("CVE-2017-0387", getDevice(), 60);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
     /**
@@ -136,6 +136,6 @@
         AdbUtils.runPoc("CVE-2017-0386", getDevice(), 60);
 
         String logcat = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertMatches("[\\s\\n\\S]*No Integer overflow[\\s\\n\\S]*", logcat);
+        assertMatchesMultiLine("No Integer overflow", logcat);
     }
 }
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_02.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_02.java
index 4c62bb6..6da38aa 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_02.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_02.java
@@ -27,7 +27,7 @@
       AdbUtils.runCommandLine("logcat -c", getDevice());
       AdbUtils.runPoc("CVE-2017-0426", getDevice(), 60);
       String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-      assertNotMatches("[\\s\\n\\S]*Bugreports file in wrong path[\\s\\n\\S]*", logcatOut);
+      assertNotMatchesMultiLine("Bugreports file in wrong path", logcatOut);
   }
 
   /**
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_08.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_08.java
index 0bb8808..f8fddbc 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc17_08.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc17_08.java
@@ -31,9 +31,9 @@
         AdbUtils.runCommandLine("logcat -c" , getDevice());
         AdbUtils.runPocNoOutput("CVE-2017-0727", getDevice(), 60);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
         TimeUnit.SECONDS.sleep(50);
     }
 
diff --git a/hostsidetests/securitybulletin/src/android/security/cts/Poc18_02.java b/hostsidetests/securitybulletin/src/android/security/cts/Poc18_02.java
index 11cb2e0..3a1b888 100644
--- a/hostsidetests/securitybulletin/src/android/security/cts/Poc18_02.java
+++ b/hostsidetests/securitybulletin/src/android/security/cts/Poc18_02.java
@@ -29,9 +29,9 @@
         AdbUtils.runCommandLine("logcat -c", getDevice());
         AdbUtils.runPocNoOutput("CVE-2017-6258", getDevice(), 60);
         String logcatOut = AdbUtils.runCommandLine("logcat -d", getDevice());
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
     /**
@@ -48,9 +48,9 @@
         AdbUtils.runCommandLine("reboot", getDevice());
         getDevice().waitForDeviceAvailable(60);
         updateKernelStartTime();
-        assertNotMatches("[\\s\\n\\S]*Fatal signal 11 \\(SIGSEGV\\)" +
+        assertNotMatchesMultiLine("Fatal signal 11 \\(SIGSEGV\\)" +
                          "[\\s\\n\\S]*>>> /system/bin/" +
-                         "mediaserver <<<[\\s\\n\\S]*", logcatOut);
+                         "mediaserver <<<", logcatOut);
     }
 
     /**
@@ -78,7 +78,7 @@
             AdbUtils.runPoc("CVE-2017-13273", getDevice(), 60);
             String dmesgOut = AdbUtils.runCommandLine("cat /sys/fs/pstore/console-ramoops",
                               getDevice());
-            assertNotMatches("[\\s\\n\\S]*CVE-2017-132736 Tainted:" + "[\\s\\n\\S]*" +
+            assertNotMatchesMultiLine("CVE-2017-132736 Tainted:" + "[\\s\\n\\S]*" +
                  "Kernel panic - not syncing: Fatal exception in interrupt", dmesgOut);
         }
         AdbUtils.runCommandLine("setenforce 1",getDevice());