diff --git a/test/extram/rom/rom.c b/test/extram/rom/rom.c
index dba5047..c284bfb 100644
--- a/test/extram/rom/rom.c
+++ b/test/extram/rom/rom.c
@@ -73,6 +73,10 @@ void main(void) {
             // pass a slice beyond end of extram
             printbuf((uint32_t)UVM32_EXTRAM_BASE + 32, 64);   // extram has been shrunk, this is now out of bounds,
         } break;
+        case TEST14: {
+            // pass a string beyond end of extram
+            println((uint32_t)UVM32_EXTRAM_BASE);   // extram has been shrunk, this is now out of bounds,
+        } break;
 
     }
 }
diff --git a/test/extram/shared.h b/test/extram/shared.h
index ec550ea..05d77a8 100644
--- a/test/extram/shared.h
+++ b/test/extram/shared.h
@@ -15,5 +15,6 @@ enum {
     TEST11,
     TEST12,
     TEST13,
+    TEST14,
 };
 
diff --git a/test/extram/test/tests.c b/test/extram/test/tests.c
index 0d50ec3..ebfadb5 100644
--- a/test/extram/test/tests.c
+++ b/test/extram/test/tests.c
@@ -369,4 +369,35 @@ void test_extram_buf_slice_beyond_extram_end(void) {
     TEST_ASSERT_EQUAL(evt.data.err.errcode, UVM32_ERR_MEM_RD);
 }
 
+void test_extram_buf_cstr_beyond_extram_end(void) {
+    // run the vm
+    uvm32_run(&vmst, &evt, 100);
+    TEST_ASSERT_EQUAL(false, uvm32_extramDirty(&vmst));
+
+    // check for picktest syscall
+    TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_SYSCALL);
+    TEST_ASSERT_EQUAL(evt.data.syscall.code, SYSCALL_PICKTEST);
+    uvm32_arg_setval(&vmst, &evt, RET, TEST14);
+
+    uvm32_run(&vmst, &evt, 100);
+    TEST_ASSERT_EQUAL(false, uvm32_extramDirty(&vmst));
+    // check for printbuf of val
+    TEST_ASSERT_EQUAL(UVM32_EVT_SYSCALL, evt.typ);
+    TEST_ASSERT_EQUAL(evt.data.syscall.code, UVM32_SYSCALL_PRINTLN);
+
+    // replace extram with a tiny one, so read is off the end
+    uint32_t r[3];
+    // non-zero so string never terminates
+    memset(r, 0xAA, sizeof(r));
+    uvm32_extram(&vmst, (uint8_t *)r, sizeof(r));
+
+    // string starts in valid extram, but no terminator will be found before hitting end of extram
+    // check that reading from non-existent extram gives empty string and puts into err state
+    const char *str = uvm32_arg_getcstr(&vmst, &evt, ARG0);
+    TEST_ASSERT_EQUAL(0, strlen(str));
+    uvm32_run(&vmst, &evt, 100);
+    TEST_ASSERT_EQUAL(evt.typ, UVM32_EVT_ERR);
+    TEST_ASSERT_EQUAL(evt.data.err.errcode, UVM32_ERR_MEM_RD);
+}
+