diff --git a/test/unordered/insert_tests.cpp b/test/unordered/insert_tests.cpp
index 54cca259..9db9e3f1 100644
--- a/test/unordered/insert_tests.cpp
+++ b/test/unordered/insert_tests.cpp
@@ -541,9 +541,11 @@ UNORDERED_AUTO_TEST(map_emplace_test)
 {
     boost::unordered_map<int, overloaded_constructor> x;
 
+#if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
     x.emplace();
     BOOST_TEST(x.find(0) != x.end() &&
         x.find(0)->second == overloaded_constructor());
+#endif
 
     x.emplace(2, 3);
     BOOST_TEST(x.find(2) != x.end() &&
@@ -569,8 +571,10 @@ UNORDERED_AUTO_TEST(set_emplace_test)
     boost::unordered_set<overloaded_constructor> x;
     overloaded_constructor check;
 
+#if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
     x.emplace();
     BOOST_TEST(x.find(check) != x.end() && *x.find(check) == check);
+#endif
 
     x.clear();
     x.emplace(1);
diff --git a/test/unordered/unnecessary_copy_tests.cpp b/test/unordered/unnecessary_copy_tests.cpp
index 45c61c07..b033b0df 100644
--- a/test/unordered/unnecessary_copy_tests.cpp
+++ b/test/unordered/unnecessary_copy_tests.cpp
@@ -238,6 +238,7 @@ namespace unnecessary_copy_tests
         // 0 arguments
         // 
 
+#if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
         // The container will have to create a copy in order to compare with
         // the existing element.
         reset();
@@ -247,6 +248,7 @@ namespace unnecessary_copy_tests
 #else
         // source_cost doesn't make much sense here, but it seems to fit.
         COPY_COUNT(1); MOVE_COUNT(source_cost);
+#endif
 #endif
 
         //
@@ -323,10 +325,12 @@ namespace unnecessary_copy_tests
         // 0 arguments
         //
 
+#if !BOOST_WORKAROUND(__SUNPRO_CC, BOOST_TESTED_AT(0x5100))
         // COPY_COUNT(1) would be okay here.
         reset();
         x.emplace();
         COPY_COUNT(2); MOVE_COUNT(0);
+#endif
 
         reset();
         x.emplace(boost::unordered::piecewise_construct,