diff --git a/oscar/SleepLib/loader_plugins/prs1_loader.cpp b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
index 2c1181ee..e44f89f4 100644
--- a/oscar/SleepLib/loader_plugins/prs1_loader.cpp
+++ b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
@@ -779,6 +779,9 @@ void PRS1Loader::ScanFiles(const QStringList & paths, int sessionid_base, Machin
                 }
 
                 SessionID chunk_sid = chunk->sessionid;
+                if (chunk_sid != sid && chunk_sid > 2000) {  // log any really weird session IDs
+                    qDebug() << fi.canonicalFilePath() << chunk_sid;
+                }
                 if (m->SessionExists(sid)) {
                     delete chunk;
                     continue;
diff --git a/oscar/oscar.pro b/oscar/oscar.pro
index 3204bef8..a4476e5c 100644
--- a/oscar/oscar.pro
+++ b/oscar/oscar.pro
@@ -442,6 +442,11 @@ test {
     QT -= gui
     CONFIG += console debug
     CONFIG -= app_bundle
+    !win32 {  # add memory checking on Linux and macOS test builds
+        QMAKE_CFLAGS += -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
+        QMAKE_CXXFLAGS += -fsanitize=address -fno-omit-frame-pointer -fno-common -fsanitize-address-use-after-scope
+        QMAKE_LFLAGS += -fsanitize=address
+    }
 
     SOURCES += \
         tests/prs1tests.cpp \