diff --git a/sccomp/qa/unit/SwarmSolverTest.cxx b/sccomp/qa/unit/SwarmSolverTest.cxx
index a0b4203cebf1..f1104fa081a8 100644
--- a/sccomp/qa/unit/SwarmSolverTest.cxx
+++ b/sccomp/qa/unit/SwarmSolverTest.cxx
@@ -30,7 +30,7 @@ class SwarmSolverTest : public UnoApiTest
 
 public:
     SwarmSolverTest()
-        : UnoApiTest("sccomp/qa/unit/data")
+        : UnoApiTest(u"sccomp/qa/unit/data"_ustr)
     {
     }
 
@@ -54,7 +54,7 @@ void SwarmSolverTest::testUnconstrained()
     uno::Reference<sheet::XSolver> xSolver;
 
     xSolver.set(m_xContext->getServiceManager()->createInstanceWithContext(
-                    "com.sun.star.comp.Calc.SwarmSolver", m_xContext),
+                    u"com.sun.star.comp.Calc.SwarmSolver"_ustr, m_xContext),
                 uno::UNO_QUERY_THROW);
 
     table::CellAddress aObjective(0, 1, 1);
@@ -97,7 +97,7 @@ void SwarmSolverTest::testVariableBounded()
     uno::Reference<sheet::XSolver> xSolver;
 
     xSolver.set(m_xContext->getServiceManager()->createInstanceWithContext(
-                    "com.sun.star.comp.Calc.SwarmSolver", m_xContext),
+                    u"com.sun.star.comp.Calc.SwarmSolver"_ustr, m_xContext),
                 uno::UNO_QUERY_THROW);
 
     table::CellAddress aObjective(0, 1, 1);
@@ -142,7 +142,7 @@ void SwarmSolverTest::testVariableConstrained()
     uno::Reference<sheet::XSolver> xSolver;
 
     xSolver.set(m_xContext->getServiceManager()->createInstanceWithContext(
-                    "com.sun.star.comp.Calc.SwarmSolver", m_xContext),
+                    u"com.sun.star.comp.Calc.SwarmSolver"_ustr, m_xContext),
                 uno::UNO_QUERY_THROW);
 
     table::CellAddress aObjective(0, 1, 1);
@@ -190,7 +190,7 @@ void SwarmSolverTest::testTwoVariables()
     uno::Reference<sheet::XSolver> xSolver;
 
     xSolver.set(m_xContext->getServiceManager()->createInstanceWithContext(
-                    "com.sun.star.comp.Calc.SwarmSolver", m_xContext),
+                    u"com.sun.star.comp.Calc.SwarmSolver"_ustr, m_xContext),
                 uno::UNO_QUERY_THROW);
 
     table::CellAddress aObjective(0, 1, 5);
@@ -242,11 +242,11 @@ void SwarmSolverTest::testMultipleVariables()
     uno::Reference<sheet::XSolver> xSolver;
 
     xSolver.set(m_xContext->getServiceManager()->createInstanceWithContext(
-                    "com.sun.star.comp.Calc.SwarmSolver", m_xContext),
+                    u"com.sun.star.comp.Calc.SwarmSolver"_ustr, m_xContext),
                 uno::UNO_QUERY_THROW);
 
     uno::Reference<beans::XPropertySet> xPropSet(xSolver, uno::UNO_QUERY_THROW);
-    xPropSet->setPropertyValue("Integer", uno::Any(true));
+    xPropSet->setPropertyValue(u"Integer"_ustr, uno::Any(true));
 
     table::CellAddress aObjective(0, 5, 7);
 
diff --git a/sccomp/qa/unit/solver.cxx b/sccomp/qa/unit/solver.cxx
index a339eab4db6f..536df7425bb9 100644
--- a/sccomp/qa/unit/solver.cxx
+++ b/sccomp/qa/unit/solver.cxx
@@ -52,7 +52,7 @@ void LpSolverTest::setUp()
     test::BootstrapFixture::setUp();
     uno::Reference<frame::XDesktop2> xComponentLoader = frame::Desktop::create(m_xContext);
     uno::Reference<lang::XComponent> xComponent(xComponentLoader->loadComponentFromURL(
-            "private:factory/scalc", "_blank", 0,
+            u"private:factory/scalc"_ustr, u"_blank"_ustr, 0,
             uno::Sequence < css::beans::PropertyValue >()));
     m_xDocument.set(xComponent, uno::UNO_QUERY_THROW);
 }
@@ -67,14 +67,14 @@ void LpSolverTest::tearDown()
 #ifdef ENABLE_LPSOLVE
 void LpSolverTest::testLpSolver()
 {
-    testSolver("com.sun.star.comp.Calc.LpsolveSolver");
+    testSolver(u"com.sun.star.comp.Calc.LpsolveSolver"_ustr);
 }
 #endif
 
 #ifdef ENABLE_COINMP
 void LpSolverTest::testCoinMPSolver()
 {
-    testSolver("com.sun.star.comp.Calc.CoinMPSolver");
+    testSolver(u"com.sun.star.comp.Calc.CoinMPSolver"_ustr);
 }
 #endif
 
diff --git a/sccomp/source/solver/CoinMPSolver.cxx b/sccomp/source/solver/CoinMPSolver.cxx
index 97ed9005be82..53a787e4721c 100644
--- a/sccomp/source/solver/CoinMPSolver.cxx
+++ b/sccomp/source/solver/CoinMPSolver.cxx
@@ -46,7 +46,7 @@ private:
     virtual void SAL_CALL solve() override;
     virtual OUString SAL_CALL getImplementationName() override
     {
-        return "com.sun.star.comp.Calc.CoinMPSolver";
+        return u"com.sun.star.comp.Calc.CoinMPSolver"_ustr;
     }
     virtual OUString SAL_CALL getComponentDescription() override
     {
diff --git a/sccomp/source/solver/LpsolveSolver.cxx b/sccomp/source/solver/LpsolveSolver.cxx
index 9a21ea43a2b6..e80bd87e1a41 100644
--- a/sccomp/source/solver/LpsolveSolver.cxx
+++ b/sccomp/source/solver/LpsolveSolver.cxx
@@ -76,7 +76,7 @@ private:
     virtual void SAL_CALL solve() override;
     virtual OUString SAL_CALL getImplementationName() override
     {
-        return "com.sun.star.comp.Calc.LpsolveSolver";
+        return u"com.sun.star.comp.Calc.LpsolveSolver"_ustr;
     }
     virtual OUString SAL_CALL getComponentDescription() override
     {
diff --git a/sccomp/source/solver/SolverComponent.cxx b/sccomp/source/solver/SolverComponent.cxx
index 318a05703944..b7038090e56c 100644
--- a/sccomp/source/solver/SolverComponent.cxx
+++ b/sccomp/source/solver/SolverComponent.cxx
@@ -247,7 +247,7 @@ sal_Bool SAL_CALL SolverComponent::supportsService( const OUString& rServiceName
 
 uno::Sequence<OUString> SAL_CALL SolverComponent::getSupportedServiceNames()
 {
-    return { "com.sun.star.sheet.Solver" };
+    return { u"com.sun.star.sheet.Solver"_ustr };
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sccomp/source/solver/SwarmSolver.cxx b/sccomp/source/solver/SwarmSolver.cxx
index 6c847d1e561f..2365bfe337e9 100644
--- a/sccomp/source/solver/SwarmSolver.cxx
+++ b/sccomp/source/solver/SwarmSolver.cxx
@@ -145,13 +145,13 @@ public:
         , mbSuccess(false)
         , mfResultValue(0.0)
     {
-        registerProperty("NonNegative", PROP_NONNEGATIVE, 0, &mbNonNegative,
+        registerProperty(u"NonNegative"_ustr, PROP_NONNEGATIVE, 0, &mbNonNegative,
                          cppu::UnoType<decltype(mbNonNegative)>::get());
-        registerProperty("Integer", PROP_INTEGER, 0, &mbInteger,
+        registerProperty(u"Integer"_ustr, PROP_INTEGER, 0, &mbInteger,
                          cppu::UnoType<decltype(mbInteger)>::get());
-        registerProperty("Timeout", PROP_TIMEOUT, 0, &mnTimeout,
+        registerProperty(u"Timeout"_ustr, PROP_TIMEOUT, 0, &mnTimeout,
                          cppu::UnoType<decltype(mnTimeout)>::get());
-        registerProperty("Algorithm", PROP_ALGORITHM, 0, &mnAlgorithm,
+        registerProperty(u"Algorithm"_ustr, PROP_ALGORITHM, 0, &mnAlgorithm,
                          cppu::UnoType<decltype(mnAlgorithm)>::get());
     }
 
@@ -252,7 +252,7 @@ public:
     // XServiceInfo
     virtual OUString SAL_CALL getImplementationName() override
     {
-        return "com.sun.star.comp.Calc.SwarmSolver";
+        return u"com.sun.star.comp.Calc.SwarmSolver"_ustr;
     }
 
     sal_Bool SAL_CALL supportsService(const OUString& rServiceName) override
@@ -262,7 +262,7 @@ public:
 
     uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
     {
-        return { "com.sun.star.sheet.Solver" };
+        return { u"com.sun.star.sheet.Solver"_ustr };
     }
 
 private: