@@ -777,11 +777,6 @@ public static final class EnvInUseException extends LmdbException {
 
     private static final long serialVersionUID = 1L;
 
-    /** Creates a new instance. */
-    public EnvInUseException() {
-      super("Environment has open transactions/cursors so cannot be closed.");
-    }
-
     /**
      * Creates a new instance.
      *
 
@@ -1101,6 +1101,15 @@ void singleThreaded(final BooleanArg safeClose, final BooleanArg singleThreaded)
     testEnvUse(safeClose, singleThreaded);
   }
 
+  @Test
+  void testToString() {
+    final Path dir = tempDir.createTempDir();
+    try (Env<ByteBuffer> env =
+        Env.create().setSafeClose().setMaxReaders(64).setMaxDbs(1).open(dir)) {
+      assertThat(env.toString()).doesNotStartWith("@");
+    }
+  }
+
   private void testEnvUse(final BooleanArg safeClose, final BooleanArg singleThreaded) {
     final Path file = tempDir.createTempFile();