diff --git a/.github/workflows/sonar-scan.yml b/.github/workflows/sonar-scan.yml
index 230a275c4e..14bd6508e5 100644
--- a/.github/workflows/sonar-scan.yml
+++ b/.github/workflows/sonar-scan.yml
@@ -50,6 +50,7 @@ jobs:
           sudo apt-get install -y --allow-downgrades openssl=${openssl_ver} libssl-dev=${libssl_ver}
         sudo apt-get install -y \
                      ccache \
+                     gcovr \
                      parallel \
                      libboost-thread-dev \
                      libboost-iostreams-dev \
@@ -184,23 +185,11 @@ jobs:
         df -h
     - name: Prepare for scanning with SonarScanner
       run: |
-        find _build/libraries/[acdenptuw]*/CMakeFiles/*.dir \
-             _build/libraries/plugins/*/CMakeFiles/*.dir \
-             -type d -print \
-          | while read d; do \
-              tmpd="${d:7}"; \
-              srcd="${tmpd/CMakeFiles*.dir/.}"; \
-              gcov -o "$d" "${srcd}"/*.[ch][px][px] \
-                           "${srcd}"/include/graphene/*/*.[ch][px][px] ; \
-            done >/dev/null
-        find _build/programs/[cdgjsw]*/CMakeFiles/*.dir \
-             -type d -print \
-          | while read d; do \
-              tmpd="${d:7}"; \
-              srcd="${tmpd/CMakeFiles*.dir/.}"; \
-              gcov -o "$d" "${srcd}"/*.[ch][px][px] ; \
-            done >/dev/null
         programs/build_helpers/set_sonar_branch_for_github_actions sonar-project.properties
+        pushd _build
+        gcovr --version
+        gcovr --exclude-unreachable-branches --sonarqube ../coverage.xml -r ..
+        popd
     - name: Scan with SonarScanner
       env:
         # to get access to secrets.SONAR_TOKEN, provide GITHUB_TOKEN
diff --git a/libraries/fc b/libraries/fc
index 4d024a83b7..2405393e40 160000
--- a/libraries/fc
+++ b/libraries/fc
@@ -1 +1 @@
-Subproject commit 4d024a83b774da0e186c0c6c070e695f563da373
+Subproject commit 2405393e40219b8ff3a87ccbcc3de14e32886dda
diff --git a/sonar-project.properties b/sonar-project.properties
index 8796e257ec..c6b9acde72 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -20,7 +20,12 @@ sonar.tests=tests
 sonar.exclusions=programs/build_helper/**/*,libraries/fc/**/*,libraries/egenesis/egenesis_full.cpp
 sonar.sources=libraries,programs
 sonar.cfamily.build-wrapper-output=bw-output
-sonar.cfamily.gcov.reportsPath=.
+
+# Note:
+# It is hard to get the gcov sensor working, but gcovr works.
+# See https://community.sonarsource.com/t/code-coverage-incorrect-for-c-gcov-project/41837/5
+#sonar.cfamily.gcov.reportsPath=.
+sonar.coverageReportPaths=coverage.xml
 
 # Decide which tree the current build belongs to in SonarCloud.
 # Managed by the `set_sonar_branch*` script(s) when building with CI.
diff --git a/tests/cli/main.cpp b/tests/cli/main.cpp
index 41b3b632c8..585b2dd416 100644
--- a/tests/cli/main.cpp
+++ b/tests/cli/main.cpp
@@ -1246,8 +1246,8 @@ BOOST_FIXTURE_TEST_CASE( cli_confidential_tx_test, cli_fixture )
       // then confirm that balances are received, and then analyze the range
       // prooofs to make sure the mantissa length does not reveal approximate
       // balance (issue #480).
-      std::map<std::string, share_type> to_list = {{"alice",100000000000},
-                                                   {"bob",    1000000000}};
+      std::map<std::string, share_type> to_list = {{"alice",100000000000LL},
+                                                   {"bob",    1000000000LL}};
       vector<blind_confirmation> bconfs;
       auto core_asset = W.get_asset("1.3.0");
       BOOST_TEST_MESSAGE("Sending blind transactions to alice and bob");
diff --git a/tests/tests/settle_tests.cpp b/tests/tests/settle_tests.cpp
index 5fef6aeede..2d879f1351 100644
--- a/tests/tests/settle_tests.cpp
+++ b/tests/tests/settle_tests.cpp
@@ -1551,7 +1551,7 @@ BOOST_AUTO_TEST_CASE( create_bitassets )
       transfer( committee_account, rachelregistrar_id, asset( 10000000 ) );
       transfer( committee_account, rachelreferrer_id, asset( 10000000 ) );
       transfer( committee_account, rachel.get_id(), asset( 10000000) );
-      transfer( committee_account, paul_id, asset( 10000000000 ) );
+      transfer( committee_account, paul_id, asset( 10000000000LL ) );
 
       asset_update_operation op;
       op.issuer = biteur.issuer;