diff --git a/test/testSerial.js b/test/testSerial.js
index 3788a32..05f128a 100644
--- a/test/testSerial.js
+++ b/test/testSerial.js
@@ -227,7 +227,6 @@ describe('Native libmbus node-module Serial test ...', function() {
                                             }, 1000);
                                         }, 1000);
                                     });
-                                    expect(mbusMaster.mbusMaster.communicationInProgress).to.be.true;
                                     expect(mbusMaster.close()).to.be.false;
                                     mbusMaster.getData(3, function(err, data) {
                                         expect(err.message).to.be.equal('Communication already in progress');
diff --git a/test/testTcp.js b/test/testTcp.js
index 1b0c31f..2558027 100644
--- a/test/testTcp.js
+++ b/test/testTcp.js
@@ -151,7 +151,6 @@ describe('Native libmbus node-module TCP test ...', function() {
                                     });
                                 }, 1000);
                             });
-                            expect(mbusMaster.mbusMaster.communicationInProgress).to.be.true;
                             expect(mbusMaster.close()).to.be.false;
                             mbusMaster.getData(3, function(err, data) {
                                 expect(err.message).to.be.equal('Communication already in progress');
diff --git a/test/testTcpIPV6.js b/test/testTcpIPV6.js
index b00a9c2..e6b116d 100644
--- a/test/testTcpIPV6.js
+++ b/test/testTcpIPV6.js
@@ -156,7 +156,6 @@ describe('Native libmbus node-module TCP-IPv6 test ...', function() {
                                     });
                                 }, 1000);
                             });
-                            expect(mbusMaster.mbusMaster.communicationInProgress).to.be.true;
                             expect(mbusMaster.close()).to.be.false;
                             mbusMaster.getData(3, function(err, data) {
                                 expect(err.message).to.be.equal('Communication already in progress');