diff --git a/fhem/t/FHEM/98_Modbus/10_Timer.t b/fhem/t/FHEM/98_Modbus/10_Timer.t
index 01ca5cb7a..1c6331619 100644
--- a/fhem/t/FHEM/98_Modbus/10_Timer.t
+++ b/fhem/t/FHEM/98_Modbus/10_Timer.t
@@ -13,7 +13,7 @@ is(FhemTestUtils_gotLog("set interval test not valid"), 1, "invalid interval in
 
 
 InternalTimer(time()+1, sub() {
-    isnt(FhemTestUtils_gotLog("GetUpdate called"), 0, "GetUpdate in log");
+    isnt(FhemTestUtils_gotLog("GetUpdate .* called from"), 0, "GetUpdate in log");
     isnt(FhemTestUtils_gotLog("UpdateTimer called from.*GetUpdate"), 0, "UpdateTimer in log");
 
     done_testing;
diff --git a/fhem/t/FHEM/98_Modbus/41_Passive.t b/fhem/t/FHEM/98_Modbus/41_Passive.t
index 00fd5b853..1a6a06da3 100644
--- a/fhem/t/FHEM/98_Modbus/41_Passive.t
+++ b/fhem/t/FHEM/98_Modbus/41_Passive.t
@@ -60,7 +60,7 @@ sub testStep5 {
 
 sub testStep6 {
     LogStep "check reception of reply and send another repeated reply";
-    is(FhemTestUtils_gotLog('ParseObj has no information about handling h356'), 1, "try parsing registers");
+    is(FhemTestUtils_gotLog('has no information about handling h356'), 1, "try parsing registers");
     FhemTestUtils_resetLogs();
     FhemTestUtils_resetEvents();
     SimRead('MS', 'fe03100000000b000000400000011a00000167f378');   # the reply repeated
@@ -70,7 +70,7 @@ sub testStep6 {
 
 sub testStep7 {
     LogStep "check reception of repeated reply";
-    is(FhemTestUtils_gotLog('ParseObj has no information about handling'), 0, "no try parsing registers again since request is missing");   
+    is(FhemTestUtils_gotLog('has no information about handling'), 0, "no try parsing registers again since request is missing");   
     is(FhemTestUtils_gotLog('HandleResponse got data but we don.t have a request'), 1, "next response without a request seen");
     FhemTestUtils_resetLogs();
     FhemTestUtils_resetEvents();    
diff --git a/fhem/t/FHEM/98_Modbus/42_MasterRTU.t b/fhem/t/FHEM/98_Modbus/42_MasterRTU.t
index cebc31d9d..54816a20c 100644
--- a/fhem/t/FHEM/98_Modbus/42_MasterRTU.t
+++ b/fhem/t/FHEM/98_Modbus/42_MasterRTU.t
@@ -140,7 +140,7 @@ sub testStep21 {
 
 sub testStep22 {
     LogStep('check reception of response with added 0');
-    is(FhemTestUtils_gotLog('ParseObj called from HandleResponse with data hex 0137, type h'), 1, "correct data part extracted");
+    is(FhemTestUtils_gotLog('called from HandleResponse with data hex 0137, type h'), 1, "correct data part extracted");
     is(FhemTestUtils_gotEvent(qr/PWP:dummy500:\s311/xms), 1, "Parse h500");
     fhem 'attr PWP verbose 3';
     return;
diff --git a/fhem/t/FHEM/98_Modbus/50_MasterSlave0.cfg b/fhem/t/FHEM/98_Modbus/50_MasterSlave0.cfg
index e21c6d6e2..a6a0806ad 100644
--- a/fhem/t/FHEM/98_Modbus/50_MasterSlave0.cfg
+++ b/fhem/t/FHEM/98_Modbus/50_MasterSlave0.cfg
@@ -94,6 +94,9 @@ attr Master obj-h10-map 0:off, 1:on
 attr Master obj-h11-reading o2
 attr Master obj-h11-min 1
 attr Master obj-h11-max 3
+
+attr Master obj-h999-reading NoReading
+
 attr Master dev-h-defSet 1
 attr Master dev-c-defSet 1
 attr Master dev-h-defShowGet 1
diff --git a/fhem/t/FHEM/98_Modbus/50_MasterSlave0.t b/fhem/t/FHEM/98_Modbus/50_MasterSlave0.t
index f16185fd5..0fa523490 100644
--- a/fhem/t/FHEM/98_Modbus/50_MasterSlave0.t
+++ b/fhem/t/FHEM/98_Modbus/50_MasterSlave0.t
@@ -34,7 +34,7 @@ sub testStep1 {     # preparation of slave content, enable devices
 sub testStep2 {     # get holding registers 
     LogStep "get TempWasserEin";
     fhem ('attr Master verbose 3');
-    fhem ('attr Slave verbose 3');
+    fhem ('attr Slave verbose 3'); 
     fhem ('get Master TempWasserEin');
     fhem ('get Master Test1');
     fhem ('get Master Test2');
@@ -104,15 +104,14 @@ sub testStep9 {     # check write data
     LogStep "check log for map and set o2 2";
     is(FhemTestUtils_gotLog('0506000a0001698c'), 1, "set o1 on message in log");
     is(FhemTestUtils_gotLog('0506000b0002784d'), 1, "set O2 2 message in log");
+    CheckAndReset();
     fhem ('attr Master verbose 3');
     return 0.1;
 }
 
-
 sub testStep10 {    # check combined read of holding registers and coils
     LogStep "getUpdate with combine";
-    FhemTestUtils_resetEvents();
-    fhem ('attr Master verbose 3');
+    fhem ('attr Master verbose 5'); # 3
     fhem ('attr Slave verbose 3');
     fhem ('set Master reread');
     return 0.15;
@@ -159,20 +158,19 @@ sub testStep14 {
     fhem ('attr Master closeAfterResponse 1');
     fhem ('attr Master verbose 4');
     fhem ('set Master reread');
-    return 0.1;
+    return 0.2;
 }
 
 sub testStep15 {
     is(FhemTestUtils_gotEvent(qr/Master:Test1: 6/), 1, "Retrieve Test1");
     is(FhemTestUtils_gotEvent(qr/Master:Test3: abcdefg/), 1, "Retrieve Test4");   
     is(FhemTestUtils_gotLog('HandleResponse will close because closeAfterResponse is set and queue is empty'), 1, "closed");
+    CheckAndReset();
     return 0.1;
 }
 
 sub testStep16 {
     LogStep "try get while closed";
-    FhemTestUtils_resetEvents();
-    FhemTestUtils_resetLogs();
     fhem ('get Master TempWasserEin');
     fhem ('attr Master queueDelay 0.3');
     return 0.1;
@@ -189,18 +187,17 @@ sub testStep18 {
     LogStep "check get result after another delay";
     is(FhemTestUtils_gotEvent(qr/Master:TempWasserEin:\s12/xms), 1, "retrieve from local slave after open and QueueDelay");
     is(FhemTestUtils_gotLog('close because closeAfterResponse'), 1, "device closed again");
+    CheckAndReset();
     return 0.1;
 }
 
 
 sub testStep19 {
     LogStep "now that the connection is closed again, try another prioritized get";
-    FhemTestUtils_resetEvents();
-    FhemTestUtils_resetLogs();
-    fhem ('attr Master nonPrioritizedGet 0');
-    fhem ('attr Master dev-timing-timeout 0.5');
-    fhem ('attr Master verbose 5');
-    fhem ('get Master TempWasserEin');
+    fhem 'attr Master nonPrioritizedGet 0';
+    fhem 'attr Master dev-timing-timeout 0.5';
+    fhem 'attr Master verbose 5';
+    fhem 'get Master TempWasserEin';
     return 0.1;
 }
 
@@ -215,7 +212,44 @@ sub testStep20 {
 sub testStep21 {
     LogStep "check result after prio get";
     is(FhemTestUtils_gotLog('Master: read.* buffer: 050302000c4981'), 1, "answer arrives after readanswer timeout");
+    CheckAndReset();
     return;
 }
 
+
+sub testStep30 { 
+    LogStep "try to read non existant register from slave";
+    fhem ('attr Master closeAfterResponse 0');
+    fhem 'attr Slave verbose 5';
+    fhem 'attr Master nonPrioritizedGet 1';
+    fhem 'get Master NoReading';
+    return 0.2;
+}
+
+sub testStep31 {     
+    LogStep "check read NoReading result";
+    is(FhemTestUtils_gotLog('HandleResponse done.*fCode 131'), 1, "got address error from Slave");
+    CheckAndReset();
+    return 0.1;
+}
+
+sub testStep35 {  
+    LogStep "try to read non existant register from slave with error code set to 0";
+    fhem 'attr Slave dev-addressErrCode 0';
+    fhem 'get Master NoReading';
+    return 0.2;
+}
+
+sub testStep36 {     
+    LogStep "check read NoReading result";
+    is(FhemTestUtils_gotLog('HandleResponse done.*fCode 131'), 0, "got no address error from Slave");
+    return 0.1;
+}
+
+sub testStep32 {     
+    #LogStep "";
+    #is(FhemTestUtils_gotEvent(qr/D1:TempWasserAus:\s20/xms), 1, "Write value to local slave");
+    return 0.1;
+}
+
 1;
diff --git a/fhem/t/FHEM/98_Modbus/50_MasterSlave1.cfg b/fhem/t/FHEM/98_Modbus/50_MasterSlave1.cfg
new file mode 100644
index 000000000..f2dad9735
--- /dev/null
+++ b/fhem/t/FHEM/98_Modbus/50_MasterSlave1.cfg
@@ -0,0 +1,21 @@
+attr global mseclog 1
+
+define Slave ModbusAttr 5 slave global:5501
+attr Slave obj-h256-reading TempWasserEin
+attr Slave obj-h258-reading TempWasserAus
+
+define Master ModbusAttr 5 0 localhost:5501
+attr Master disable 1
+attr Master verbose 3
+attr Master nonPrioritizedGet 1
+attr Master nonPrioritizedSet 1
+
+attr Master dev-timing-sendDelay 0
+attr Master dev-timing-commDelay 0
+attr Master dev-h-defSet 1
+attr Master dev-h-defShowGet 1
+attr Master dev-h-combine 19
+
+attr Master obj-h256-reading TempWasserEin
+attr Master obj-h258-reading TempWasserAus
+
diff --git a/fhem/t/FHEM/98_Modbus/50_MasterSlave1.t b/fhem/t/FHEM/98_Modbus/50_MasterSlave1.t
new file mode 100644
index 000000000..4b4c457fa
--- /dev/null
+++ b/fhem/t/FHEM/98_Modbus/50_MasterSlave1.t
@@ -0,0 +1,58 @@
+##############################################
+# test master slave with setexpr
+##############################################
+
+package main;
+
+use strict;
+use warnings;
+use Test::More;
+use Time::HiRes     qw( gettimeofday tv_interval);  # return time as float, not just full seconds
+use FHEM::HTTPMOD::Utils qw(:all);
+use FHEM::Modbus::TestUtils qw(:all);
+
+fhem 'attr global mseclog 1';
+NextStep();
+
+sub testStep1 {     # preparation of slave content, enable devices
+    is(FhemTestUtils_gotLog('attribute'), 0, "no unknown attributes");     # logs during init are not collected.
+    LogStep "enable Master and set value at Slave";
+    fhem ('attr Master disable 0');
+    fhem ('attr Master obj-h258-setExpr $val * 3');
+    fhem ('setreading Slave TempWasserEin 12');
+    return 0.1;
+}
+
+sub testStep10 {  # set with setexpr   
+    fhem ('attr Slave obj-h258-allowWrite 1');
+    fhem ('attr Master obj-h258-setexpr $val * 2');
+    fhem ('set Master TempWasserAus 20');
+    return 0.1;
+}
+
+sub testStep11 {     # check that write holding register did work
+    LogStep "check result";
+    is(FhemTestUtils_gotEvent(qr/Slave:TempWasserAus:\s40/xms), 1, "Write value to local slave");
+    return 0.1;
+}
+
+sub setExprSub {
+    my $val = shift;
+    return $val * 3;
+}
+
+sub testStep20 {  
+    fhem ('attr Slave obj-h258-allowWrite 1');
+    fhem ('attr Master obj-h258-setexpr setExprSub ($val)');
+    fhem ('attr Master verbose 5');
+    fhem ('set Master TempWasserAus 20');
+    return 0.1;
+}
+
+sub testStep21 {     # check that write holding register did work
+    LogStep "check result";
+    is(FhemTestUtils_gotEvent(qr/Slave:TempWasserAus:\s60/xms), 1, "Write value to local slave");
+    return 0.1;
+}
+
+1;
diff --git a/fhem/t/FHEM/98_Modbus/51_Combine.cfg b/fhem/t/FHEM/98_Modbus/51_Combine.cfg
index 2019cae12..1c2fa65dc 100644
--- a/fhem/t/FHEM/98_Modbus/51_Combine.cfg
+++ b/fhem/t/FHEM/98_Modbus/51_Combine.cfg
@@ -1,6 +1,7 @@
 attr global mseclog 1
 
 define Slave ModbusAttr 5 slave global:5501
+attr Slave dev-addressErrCode 0
 attr Slave obj-h256-reading TempWasserEin
 attr Slave obj-h258-reading TempWasserAus
 
@@ -20,9 +21,14 @@ attr Slave obj-h120-unpack f>
 attr Slave obj-h120-len 2
 
 attr Slave obj-h130-reading Test5
-attr Slave obj-h130-unpack a*
+attr Slave obj-h130-unpack f<
 attr Slave obj-h130-len 2
 
+attr Slave obj-h132-reading Test6
+attr Slave obj-h132-poll 1
+attr Slave obj-h132-unpack n
+attr Slave obj-h132-polldelay 0
+
 attr Slave obj-c400-reading c0
 attr Slave obj-c401-reading c1
 attr Slave obj-c402-reading c2
@@ -83,9 +89,13 @@ attr Master obj-h120-ignoreExpr $val > 10
 attr Master obj-h120-polldelay 0
 
 attr Master obj-h130-reading Test5
-attr Master obj-h130-unpack a*
+attr Master obj-h130-unpack f<
 attr Master obj-h130-len 2
-attr Master obj-h130-encode utf8
+
+attr Master obj-h132-reading Test6
+attr Master obj-h132-poll 1
+attr Master obj-h132-unpack n
+attr Master obj-h132-polldelay 0
 
 attr Master obj-h10-reading o1
 attr Master obj-h10-map 0:off, 1:on
@@ -123,4 +133,4 @@ attr Master obj-c406-poll 1
 attr Master obj-c417-poll 1
 
 attr Master dev-h-combine 19
-attr Master dev-c-combine 32
\ No newline at end of file
+attr Master dev-c-combine 32
diff --git a/fhem/t/FHEM/98_Modbus/51_Combine.t b/fhem/t/FHEM/98_Modbus/51_Combine.t
index 7d8055e26..f748b5aec 100644
--- a/fhem/t/FHEM/98_Modbus/51_Combine.t
+++ b/fhem/t/FHEM/98_Modbus/51_Combine.t
@@ -17,27 +17,28 @@ NextStep();
 sub testStep1 {     # preparation of slave content, enable devices
     is(FhemTestUtils_gotLog('attribute'), 0, "no unknown attributes");     # logs during init are not collected.
     LogStep "enable Master and set value at Slave";
-    fhem ('attr Master disable 0');
-    fhem ('setreading Slave TempWasserEin 12');
-    fhem ('setreading Slave Test1 1');
-    fhem ('setreading Slave Test2 2.123');
-    fhem ('setreading Slave Test3 abcdefg');
-    fhem ('setreading Slave Test4 40');
-    fhem ('setreading Slave c0 1');
-    fhem ('setreading Slave c5 1');
-    fhem ('setreading Slave c17 1');
-    readingsSingleUpdate($defs{'Slave'}, 'Test5', pack('H*', 'e4f6fc'), 0);   
-    fhem ('attr Master verbose 4');
-    fhem ('attr Slave verbose 3');
+    fhem 'attr Master disable 0';
+    fhem 'setreading Slave TempWasserEin 12';
+    fhem 'setreading Slave Test1 1';
+    fhem 'setreading Slave Test2 2.123';
+    fhem 'setreading Slave Test3 abcdefg';
+    fhem 'setreading Slave Test4 40';
+    fhem 'setreading Slave Test5 10';
+    fhem 'setreading Slave Test6 6';
+    fhem 'setreading Slave c0 1';
+    fhem 'setreading Slave c5 1';
+    fhem 'setreading Slave c17 1';
+    fhem 'attr Master verbose 5';   # 4
+    fhem 'attr Slave verbose 3';    #3
+    CheckAndReset();
     return 0.1;
 }
 
 
 sub testStep10 {    # check combined read of holding registers and coils
     LogStep "getUpdate with combine";
-    FhemTestUtils_resetEvents();
-    fhem ('set Master reread');
-    return 0.2;
+    fhem 'set Master reread';
+    return 0.7;
 }
 
 sub testStep11 {    # check results coming from slave 
@@ -48,21 +49,27 @@ sub testStep11 {    # check results coming from slave
     is(FhemTestUtils_gotEvent(qr/Master:c1: 0/), 1, "Combined Retrieve coil bit 1 from local slave");
     is(FhemTestUtils_gotEvent(qr/Master:c17: 1/), 1, "Combined Retrieve coil bit 17 from local slave");
 
+    ok(FhemTestUtils_gotLog('read fc 3 h100, len 7') >= 2,'saw right first combination in log');
+    ok(FhemTestUtils_gotLog('read fc 3 h120, len 13') >= 2,'saw right second combination in log');
+
+    CheckAndReset();
     return 0.1;
 }
 
 sub testStep20 {    # check timeout handling / logging
     LogStep "getUpdate with timeout";
-    FhemTestUtils_resetEvents();
     fhem 'defmod Slave ModbusAttr 55 slave global:5501';
+    fhem 'attr Master dev-timing-timeout 0.2';
     fhem 'set Master reread';
-    return 1;
+    return 1.5;
 }
 
 
 sub testStep21 {    # check results coming from slave 
+    ok(FhemTestUtils_gotLog('Timeout waiting for a modbus response') > 1,'timeout for missing salve');
     return;
 }
 
 
+
 1;
diff --git a/fhem/t/FHEM/98_Modbus/52_Combine2.cfg b/fhem/t/FHEM/98_Modbus/52_Combine2.cfg
new file mode 100644
index 000000000..b2ffe56b1
--- /dev/null
+++ b/fhem/t/FHEM/98_Modbus/52_Combine2.cfg
@@ -0,0 +1,106 @@
+attr global mseclog 1
+
+define Slave ModbusAttr 5 slave global:5501
+attr Slave dev-addressErrCode 0
+attr Slave obj-h256-reading TempWasserEin
+attr Slave obj-h258-reading TempWasserAus
+
+attr Slave obj-h100-reading Test1
+
+attr Slave obj-h101-reading Test2
+attr Slave obj-h101-unpack f>
+attr Slave obj-h101-len 2
+
+attr Slave obj-h103-reading Test2m
+
+attr Slave obj-h120-reading Test4a
+attr Slave obj-h120-unpack f>
+attr Slave obj-h120-len 2
+
+attr Slave obj-h122-reading Test4b
+attr Slave obj-h122-unpack f>
+attr Slave obj-h122-len 2
+
+
+attr Slave obj-h130-reading Test5
+attr Slave obj-h130-unpack f<
+attr Slave obj-h130-len 2
+
+attr Slave obj-h132-reading Test5m
+attr Slave obj-h132-unpack n
+
+
+define Master ModbusAttr 5 0 localhost:5501
+attr Master disable 1
+attr Master verbose 3
+attr Master nonPrioritizedGet 1
+attr Master nonPrioritizedSet 1
+
+attr Master dev-timing-sendDelay 0
+attr Master dev-timing-commDelay 0
+attr Master dev-timing-timeout 0.5
+
+attr Master obj-h256-reading TempWasserEin
+attr Master obj-h256-poll 1
+attr Master obj-h258-reading TempWasserAus
+attr Master obj-h258-poll 1
+
+attr Master obj-h100-reading Test1
+attr Master obj-h100-expr $val + 2
+attr Master obj-h100-poll 1
+attr Master obj-h100-polldelay 0
+
+attr Master obj-h101-reading Test2
+attr Master obj-h101-unpack f>
+attr Master obj-h101-len 2
+attr Master obj-h101-format %.2f
+attr Master obj-h101-poll 1
+attr Master obj-h101-polldelay 0
+attr Master obj-h101-group 2-2
+attr Master obj-h101-expr ReadingsVal($name, 'Test2m', 0) * $val
+
+attr Master obj-h103-reading Test2m
+attr Master obj-h103-poll 1
+attr Master obj-h103-polldelay 0
+attr Master obj-h103-group 2-1
+
+attr Master obj-h120-reading Test4a
+attr Master obj-h120-unpack f>
+attr Master obj-h120-len 2
+attr Master obj-h120-format %.2f
+attr Master obj-h120-poll 1
+attr Master obj-h120-polldelay 0
+attr Master obj-h120-group 3-1
+
+attr Master obj-h122-reading Test4b
+attr Master obj-h122-unpack f>
+attr Master obj-h122-len 2
+attr Master obj-h122-format %.2f
+attr Master obj-h122-poll 1
+attr Master obj-h122-polldelay 0
+attr Master obj-h122-group 3-2
+attr Master obj-h122-expr ReadingsVal($name, 'Test4a', 0) + $val
+
+attr Master obj-h130-reading Test5
+attr Master obj-h130-unpack f<
+attr Master obj-h130-len 2
+attr Master obj-h130-group 1-1
+attr Master obj-h130-poll 1
+attr Master obj-h130-expr ReadingsVal($name, 'Test5m', 0) * $val
+
+attr Master obj-h132-reading Test5m
+attr Master obj-h132-unpack n
+attr Master obj-h132-polldelay 0
+attr Master obj-h132-group 1-2
+
+attr Master obj-h10-reading o1
+attr Master obj-h10-map 0:off, 1:on
+
+attr Master obj-h11-reading o2
+attr Master obj-h11-min 1
+attr Master obj-h11-max 3
+attr Master dev-h-defSet 1
+attr Master dev-c-defSet 1
+attr Master dev-h-defShowGet 1
+
+attr Master dev-h-combine 22
diff --git a/fhem/t/FHEM/98_Modbus/52_Combine2.t b/fhem/t/FHEM/98_Modbus/52_Combine2.t
new file mode 100644
index 000000000..de9c4f026
--- /dev/null
+++ b/fhem/t/FHEM/98_Modbus/52_Combine2.t
@@ -0,0 +1,72 @@
+##############################################
+# test master slave end to end
+##############################################
+
+package main;
+
+use strict;
+use warnings;
+use Test::More;
+use Time::HiRes     qw( gettimeofday tv_interval);  # return time as float, not just full seconds
+use FHEM::HTTPMOD::Utils qw(:all);
+use FHEM::Modbus::TestUtils qw(:all);
+
+fhem 'attr global mseclog 1';
+NextStep();
+
+sub testStep1 {     # preparation of slave content, enable devices
+    is(FhemTestUtils_gotLog('attribute'), 0, "no unknown attributes");     # logs during init are not collected.
+    LogStep "enable Master and set value at Slave";
+    fhem 'attr Master disable 0';
+    fhem 'setreading Slave Test1 1';
+    fhem 'setreading Slave TempWasserEin 12';
+    fhem 'setreading Slave TempWasserAus 14';
+
+    fhem 'setreading Slave Test2 2.123';
+    fhem 'setreading Slave Test2m 2';
+
+    fhem 'setreading Slave Test4a 10';
+    fhem 'setreading Slave Test4b 20';
+
+    fhem 'setreading Slave Test5 10';
+    fhem 'setreading Slave Test5m 6';
+
+    # initialize readings at master to check the order later
+    fhem 'setreading Master Test1 1';
+
+    fhem 'setreading Master Test2 1';
+    fhem 'setreading Master Test2m 1';
+
+    fhem 'setreading Master Test3 1';
+
+    fhem 'setreading Master Test4a 1';
+    fhem 'setreading Master Test4b 1';
+
+    fhem 'setreading Master Test5 1';
+    fhem 'setreading Master Test5m 1';
+
+    fhem 'attr Master verbose 4';   # 4
+    fhem 'attr Slave verbose 3';    #3
+    CheckAndReset();
+    return 0.1;
+}
+
+
+sub testStep10 {    # check combined read of holding registers and coils
+    LogStep "getUpdate with combine";
+    fhem 'set Master reread';
+    return 1;
+}
+
+sub testStep11 {    # check results coming from slave 
+    is(FhemTestUtils_gotEvent(qr/Master:Test2: 4.25/), 1, "Combined retrieve float value from local slave");
+    is(FhemTestUtils_gotEvent(qr/Master:Test4b: 30/), 1, "Combined retrieve float value from local slave");
+    is(FhemTestUtils_gotEvent(qr/Master:Test5: 10/), 1, "Combined retrieve float value from local slave");
+    is(FhemTestUtils_gotEvent(qr/Master:Test5m: 6/), 1, "Combined retrieve float value from local slave");
+
+    CheckAndReset();
+    return 0.1;
+}
+
+
+1;
diff --git a/fhem/t/FHEM/98_Modbus/56_Scan.t b/fhem/t/FHEM/98_Modbus/56_Scan.t
index 826b1e0fd..ba7d24a02 100644
--- a/fhem/t/FHEM/98_Modbus/56_Scan.t
+++ b/fhem/t/FHEM/98_Modbus/56_Scan.t
@@ -62,11 +62,11 @@ sub testStep6 {
 }
 
 sub testStep7 {
-    #fhem ('attr Master verbose 5');
-    #fhem ('attr Slave verbose 5');
+    fhem ('attr Master verbose 4');
+    fhem ('attr Slave verbose 5');
     fhem ('attr Master dev-timing-timeout 0.3');
     fhem ('set Master scanModbusId 1-8 h100');
-    return 2;
+    return 6;
 }