diff --git a/sonar-project.properties b/sonar-project.properties
index a058804d..8fe0ea9f 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -10,6 +10,10 @@ sonar.sources=.
 # Encoding of the source code. Default is default system encoding
 sonar.sourceEncoding=UTF-8
 
+# Ignore duplication on test files.
+# These files contain raw transaction data, which contains duplicated parts (headers, etc).
+sonar.cpd.exclusions=libsol/*_test.c
+
 sonar.cfamily.threads=1
 sonar.cfamily.cache.enabled=false