diff --git a/src/test/checkqueue_tests.cpp b/src/test/checkqueue_tests.cpp
--- a/src/test/checkqueue_tests.cpp
+++ b/src/test/checkqueue_tests.cpp
@@ -147,9 +147,6 @@
         BOOST_REQUIRE(control.Wait());
         if (FakeCheckCheckCompletion::n_calls != i) {
             BOOST_REQUIRE_EQUAL(FakeCheckCheckCompletion::n_calls, i);
-            BOOST_TEST_MESSAGE("Failure on trial "
-                               << i << " expected, got "
-                               << FakeCheckCheckCompletion::n_calls);
         }
     }
     tg.interrupt_all();
diff --git a/src/test/rcu_tests.cpp b/src/test/rcu_tests.cpp
--- a/src/test/rcu_tests.cpp
+++ b/src/test/rcu_tests.cpp
@@ -131,6 +131,9 @@
         tlock.join();
         tsync.join();
     }
+
+    // Needed to suppress "Test case [...] did not check any assertions"
+    BOOST_CHECK(true);
 }
 
 BOOST_AUTO_TEST_CASE(cleanup_test) {
diff --git a/src/test/streams_tests.cpp b/src/test/streams_tests.cpp
--- a/src/test/streams_tests.cpp
+++ b/src/test/streams_tests.cpp
@@ -204,17 +204,17 @@
     CDataStream ds(in, 0, 0);
 
     // read 0 bytes used to cause a segfault on some older systems.
-    ds.read(nullptr, 0);
+    BOOST_CHECK_NO_THROW(ds.read(nullptr, 0));
 
     // Same goes for writing 0 bytes from a vector ...
     const std::vector<char> vdata{'f', 'o', 'o', 'b', 'a', 'r'};
-    ds.insert(ds.begin(), vdata.begin(), vdata.begin());
-    ds.insert(ds.begin(), vdata.begin(), vdata.end());
+    BOOST_CHECK_NO_THROW(ds.insert(ds.begin(), vdata.begin(), vdata.begin()));
+    BOOST_CHECK_NO_THROW(ds.insert(ds.begin(), vdata.begin(), vdata.end()));
 
     // ... or an array.
     const char adata[6] = {'f', 'o', 'o', 'b', 'a', 'r'};
-    ds.insert(ds.begin(), &adata[0], &adata[0]);
-    ds.insert(ds.begin(), &adata[0], &adata[6]);
+    BOOST_CHECK_NO_THROW(ds.insert(ds.begin(), &adata[0], &adata[0]));
+    BOOST_CHECK_NO_THROW(ds.insert(ds.begin(), &adata[0], &adata[6]));
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -60,7 +60,11 @@
 
     fCheckBlockIndex = true;
     SelectParams(chainName);
-    noui_connect();
+    static bool noui_connected = false;
+    if (!noui_connected) {
+        noui_connect();
+        noui_connected = true;
+    }
 }
 
 BasicTestingSetup::~BasicTestingSetup() {
diff --git a/src/test/torcontrol_tests.cpp b/src/test/torcontrol_tests.cpp
--- a/src/test/torcontrol_tests.cpp
+++ b/src/test/torcontrol_tests.cpp
@@ -19,7 +19,6 @@
 
 static void CheckSplitTorReplyLine(std::string input, std::string command,
                                    std::string args) {
-    BOOST_TEST_MESSAGE(std::string("CheckSplitTorReplyLine(") + input + ")");
     auto ret = SplitTorReplyLine(input);
     BOOST_CHECK_EQUAL(ret.first, command);
     BOOST_CHECK_EQUAL(ret.second, args);
@@ -57,7 +56,6 @@
 static void
 CheckParseTorReplyMapping(std::string input,
                           std::map<std::string, std::string> expected) {
-    BOOST_TEST_MESSAGE(std::string("CheckParseTorReplyMapping(") + input + ")");
     auto ret = ParseTorReplyMapping(input);
     BOOST_CHECK_EQUAL(ret.size(), expected.size());
     auto r_it = ret.begin();
@@ -167,7 +165,6 @@
 
     // Special handling for null case
     // (needed because string comparison reads the null as end-of-string)
-    BOOST_TEST_MESSAGE(std::string("CheckParseTorReplyMapping(Null=\"\\0\")"));
     auto ret = ParseTorReplyMapping("Null=\"\\0\"");
     BOOST_CHECK_EQUAL(ret.size(), 1U);
     auto r_it = ret.begin();
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -36,7 +36,11 @@
 
     do {
         TRY_LOCK(cs, lockTest);
-        if (lockTest) break;
+        if (lockTest) {
+            // Needed to suppress "Test case [...] did not check any assertions"
+            BOOST_CHECK(true);
+            break;
+        }
 
         BOOST_ERROR("break was swallowed!");
     } while (0);
diff --git a/src/wallet/test/coinselector_tests.cpp b/src/wallet/test/coinselector_tests.cpp
--- a/src/wallet/test/coinselector_tests.cpp
+++ b/src/wallet/test/coinselector_tests.cpp
@@ -148,7 +148,6 @@
     /////////////////////////
     // Known Outcome tests //
     /////////////////////////
-    BOOST_TEST_MESSAGE("Testing known outcomes");
 
     // Empty utxo pool
     BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, CENT / 2,