diff --git a/lib/cppcheck.cpp b/lib/cppcheck.cpp
index 45e88ced7..54559e6f3 100644
--- a/lib/cppcheck.cpp
+++ b/lib/cppcheck.cpp
@@ -747,10 +747,15 @@ void CppCheck::reportErr(const ErrorLogger::ErrorMessage &msg)
 
     const Suppressions::ErrorMessage errorMessage = msg.toSuppressionsErrorMessage();
 
-    if (_settings.nomsg.isSuppressed(errorMessage))
-        return;
+    if (_useGlobalSuppressions) {
+        if (_settings.nomsg.isSuppressed(errorMessage))
+            return;
+    } else {
+        if (_settings.nomsg.isSuppressedLocal(errorMessage))
+            return;
+    }
 
-    if (!_settings.nofail.isSuppressed(errorMessage))
+    if (!_settings.nofail.isSuppressed(errorMessage) && (_useGlobalSuppressions || !_settings.nomsg.isSuppressed(errorMessage)))
         exitcode = 1;
 
     _errorList.push_back(errmsg);
diff --git a/lib/suppressions.cpp b/lib/suppressions.cpp
index 18d95f97f..539df8557 100644
--- a/lib/suppressions.cpp
+++ b/lib/suppressions.cpp
@@ -277,6 +277,21 @@ bool Suppressions::isSuppressed(const Suppressions::ErrorMessage &errmsg)
     return false;
 }
 
+bool Suppressions::isSuppressedLocal(const Suppressions::ErrorMessage &errmsg)
+{
+    const bool unmatchedSuppression(errmsg.errorId == "unmatchedSuppression");
+    for (std::list<Suppression>::iterator it = _suppressions.begin(); it != _suppressions.end(); ++it) {
+        Suppression &s = *it;
+        if (!s.isLocal())
+            continue;
+        if (unmatchedSuppression && s.errorId != errmsg.errorId)
+            continue;
+        if (s.isMatch(errmsg))
+            return true;
+    }
+    return false;
+}
+
 void Suppressions::dump(std::ostream & out)
 {
     out << "  <suppressions>" << std::endl;
@@ -294,6 +309,8 @@ void Suppressions::dump(std::ostream & out)
     out << "  </suppressions>" << std::endl;
 }
 
+#include <iostream>
+
 std::list<Suppressions::Suppression> Suppressions::getUnmatchedLocalSuppressions(const std::string &file, const bool unusedFunctionChecking) const
 {
     std::list<Suppression> result;
@@ -303,7 +320,7 @@ std::list<Suppressions::Suppression> Suppressions::getUnmatchedLocalSuppressions
             continue;
         if (!unusedFunctionChecking && s.errorId == "unusedFunction")
             continue;
-        if (!file.empty() && !s.fileName.empty() && s.fileName != file)
+        if (file.empty() || !s.isLocal() || s.fileName != file)
             continue;
         result.push_back(s);
     }
@@ -319,7 +336,7 @@ std::list<Suppressions::Suppression> Suppressions::getUnmatchedGlobalSuppression
             continue;
         if (!unusedFunctionChecking && s.errorId == "unusedFunction")
             continue;
-        if (s.fileName.find_first_of("?*") == std::string::npos)
+        if (s.isLocal())
             continue;
         result.push_back(s);
     }
diff --git a/lib/suppressions.h b/lib/suppressions.h
index ac784fe99..a3ab80aa2 100644
--- a/lib/suppressions.h
+++ b/lib/suppressions.h
@@ -88,6 +88,10 @@ public:
         bool isMatch(const ErrorMessage &errmsg);
         std::string getText() const;
 
+        bool isLocal() const {
+            return !fileName.empty() && fileName.find_first_of("?*") == std::string::npos;
+        }
+
         std::string errorId;
         std::string fileName;
         int lineNumber;
@@ -135,6 +139,13 @@ public:
      */
     bool isSuppressed(const ErrorMessage &errmsg);
 
+    /**
+     * @brief Returns true if this message should not be shown to the user, only uses local suppressions.
+     * @param errmsg error message
+     * @return true if this error is suppressed.
+     */
+    bool isSuppressedLocal(const ErrorMessage &errmsg);
+
     /**
      * @brief Create an xml dump of suppressions
      * @param out stream to write XML to
diff --git a/test/testsuppressions.cpp b/test/testsuppressions.cpp
index bb1f3d54c..564547ba3 100644
--- a/test/testsuppressions.cpp
+++ b/test/testsuppressions.cpp
@@ -50,6 +50,8 @@ private:
         TEST_CASE(inlinesuppress);
         TEST_CASE(inlinesuppress_symbolname);
 
+        TEST_CASE(globalSuppressions); // Testing that global suppressions work (#8515)
+
         TEST_CASE(inlinesuppress_unusedFunction); // #4210 - unusedFunction
         TEST_CASE(globalsuppress_unusedFunction); // #4946
         TEST_CASE(suppressionWithRelativePaths); // #4733
@@ -432,6 +434,19 @@ private:
         ASSERT_EQUALS("[test.cpp:4]: (error) Uninitialized variable: a\n", errout.str());
     }
 
+    void globalSuppressions() { // Testing that Cppcheck::useGlobalSuppressions works (#8515)
+        errout.str("");
+
+        CppCheck cppCheck(*this, false); // <- do not "use global suppressions". pretend this is a thread that just checks a file.
+        Settings& settings = cppCheck.settings();
+        settings.nomsg.addSuppressionLine("uninitvar");
+        settings.exitCode = 1;
+
+        const char code[] = "int f() { int a; return a; }";
+        ASSERT_EQUALS(0, cppCheck.check("test.c", code)); // <- no unsuppressed error is seen
+        ASSERT_EQUALS("[test.c:1]: (error) Uninitialized variable: a\n", errout.str()); // <- report error so ThreadExecutor can suppress it and make sure the global suppression is matched.
+    }
+
     void inlinesuppress_unusedFunction() const { // #4210, #4946 - wrong report of "unmatchedSuppression" for "unusedFunction"
         Suppressions suppressions;
         suppressions.addSuppression(Suppressions::Suppression("unusedFunction", "test.c", 3));