diff --git a/trusty/confirmationui/fuzz/fuzz.cpp b/trusty/confirmationui/fuzz/fuzz.cpp
index 9d3008b..df2517c 100644
--- a/trusty/confirmationui/fuzz/fuzz.cpp
+++ b/trusty/confirmationui/fuzz/fuzz.cpp
@@ -14,10 +14,7 @@
  * limitations under the License.
  */
 
-#undef NDEBUG
-
-#include <assert.h>
-#include <log/log.h>
+#include <iostream>
 #include <stdlib.h>
 #include <trusty/coverage/coverage.h>
 #include <trusty/fuzz/counters.h>
@@ -30,6 +27,7 @@
 
 #define TIPC_DEV "/dev/trusty-ipc-dev0"
 #define CONFIRMATIONUI_PORT "com.android.trusty.confirmationui"
+#define CONFIRMATIONUI_MODULE_NAME "confirmationui.syms.elf"
 
 /* ConfirmationUI TA's UUID is 7dee2364-c036-425b-b086-df0f6c233c1b */
 static struct uuid confirmationui_uuid = {
@@ -48,11 +46,14 @@
     uint8_t payload[];
 };
 
-static CoverageRecord record(TIPC_DEV, &confirmationui_uuid);
+static CoverageRecord record(TIPC_DEV, &confirmationui_uuid, CONFIRMATIONUI_MODULE_NAME);
 
 extern "C" int LLVMFuzzerInitialize(int* /* argc */, char*** /* argv */) {
     auto ret = record.Open();
-    assert(ret.ok());
+    if (!ret.ok()) {
+        std::cerr << ret.error() << std::endl;
+        exit(-1);
+    }
     return 0;
 }
 
diff --git a/trusty/coverage/coverage.cpp b/trusty/coverage/coverage.cpp
index 185abe5..5eccdc5 100644
--- a/trusty/coverage/coverage.cpp
+++ b/trusty/coverage/coverage.cpp
@@ -39,6 +39,7 @@
 using android::base::ErrnoError;
 using android::base::Error;
 using std::string;
+using std::to_string;
 using std::unique_ptr;
 
 static inline uintptr_t RoundPageUp(uintptr_t val) {
@@ -54,11 +55,11 @@
       shm_(NULL),
       shm_len_(0) {}
 
-CoverageRecord::CoverageRecord(string tipc_dev, struct uuid* uuid, string sancov_filename)
+CoverageRecord::CoverageRecord(string tipc_dev, struct uuid* uuid, string module_name)
     : tipc_dev_(std::move(tipc_dev)),
       coverage_srv_fd_(-1),
       uuid_(*uuid),
-      sancov_filename_(sancov_filename),
+      sancov_filename_(module_name + "." + to_string(getpid()) + ".sancov"),
       record_len_(0),
       shm_(NULL),
       shm_len_(0) {}
diff --git a/trusty/coverage/include/trusty/coverage/coverage.h b/trusty/coverage/include/trusty/coverage/coverage.h
index ed723f6..5da68da 100644
--- a/trusty/coverage/include/trusty/coverage/coverage.h
+++ b/trusty/coverage/include/trusty/coverage/coverage.h
@@ -43,7 +43,7 @@
      * Create a coverage record interface. On destruction, write this coverage
      * to the given sancov filename.
      */
-    CoverageRecord(std::string tipc_dev, struct uuid* uuid, std::string sancov_filename);
+    CoverageRecord(std::string tipc_dev, struct uuid* uuid, std::string module_name);
 
     ~CoverageRecord();
     Result<void> Open();
diff --git a/trusty/fuzz/test/fuzz.cpp b/trusty/fuzz/test/fuzz.cpp
index 28bb3f7..e7913db 100644
--- a/trusty/fuzz/test/fuzz.cpp
+++ b/trusty/fuzz/test/fuzz.cpp
@@ -14,15 +14,12 @@
  * limitations under the License.
  */
 
-#undef NDEBUG
-
-#include <assert.h>
-#include <log/log.h>
 #include <stdlib.h>
 #include <trusty/coverage/coverage.h>
 #include <trusty/fuzz/counters.h>
 #include <trusty/fuzz/utils.h>
 #include <unistd.h>
+#include <iostream>
 
 using android::trusty::coverage::CoverageRecord;
 using android::trusty::fuzz::ExtraCounters;
@@ -43,7 +40,10 @@
 
 extern "C" int LLVMFuzzerInitialize(int* /* argc */, char*** /* argv */) {
     auto ret = record.Open();
-    assert(ret.ok());
+    if (!ret.ok()) {
+        std::cerr << ret.error() << std::endl;
+        exit(-1);
+    }
     return 0;
 }
 
diff --git a/trusty/gatekeeper/fuzz/fuzz.cpp b/trusty/gatekeeper/fuzz/fuzz.cpp
index 4d885ce..7bfd7d1 100644
--- a/trusty/gatekeeper/fuzz/fuzz.cpp
+++ b/trusty/gatekeeper/fuzz/fuzz.cpp
@@ -14,15 +14,12 @@
  * limitations under the License.
  */
 
-#undef NDEBUG
-
-#include <assert.h>
-#include <log/log.h>
 #include <stdlib.h>
 #include <trusty/coverage/coverage.h>
 #include <trusty/fuzz/counters.h>
 #include <trusty/fuzz/utils.h>
 #include <unistd.h>
+#include <iostream>
 
 using android::trusty::coverage::CoverageRecord;
 using android::trusty::fuzz::ExtraCounters;
@@ -44,7 +41,10 @@
 
 extern "C" int LLVMFuzzerInitialize(int* /* argc */, char*** /* argv */) {
     auto ret = record.Open();
-    assert(ret.ok());
+    if (!ret.ok()) {
+        std::cerr << ret.error() << std::endl;
+        exit(-1);
+    }
     return 0;
 }
 
diff --git a/trusty/keymaster/fuzz/fuzz.cpp b/trusty/keymaster/fuzz/fuzz.cpp
index 70e19e6..4ac97bb 100644
--- a/trusty/keymaster/fuzz/fuzz.cpp
+++ b/trusty/keymaster/fuzz/fuzz.cpp
@@ -14,10 +14,6 @@
  * limitations under the License.
  */
 
-#undef NDEBUG
-
-#include <assert.h>
-#include <log/log.h>
 #include <stdlib.h>
 #include <trusty/coverage/coverage.h>
 #include <trusty/fuzz/counters.h>