diff --git a/opm/common/utility/TimeService.hpp b/opm/common/utility/TimeService.hpp
index 3843329ed..dfbcb90f0 100644
--- a/opm/common/utility/TimeService.hpp
+++ b/opm/common/utility/TimeService.hpp
@@ -22,6 +22,7 @@
 
 #include <chrono>
 #include <ctime>
+#include <string>
 #include <unordered_map>
 
 
diff --git a/opm/io/eclipse/EGrid.hpp b/opm/io/eclipse/EGrid.hpp
index c1d26f780..856cd4baa 100644
--- a/opm/io/eclipse/EGrid.hpp
+++ b/opm/io/eclipse/EGrid.hpp
@@ -72,7 +72,7 @@ private:
     std::array<int, 3> nijk;
     std::array<int, 3> host_nijk;
 
-    int nactive, m_nncs;
+    int nactive;
     mutable bool m_nncs_loaded;
 
     std::vector<int> act_index;
diff --git a/opm/parser/eclipse/EclipseState/Aquifer/NumericalAquifer/SingleNumericalAquifer.hpp b/opm/parser/eclipse/EclipseState/Aquifer/NumericalAquifer/SingleNumericalAquifer.hpp
index 6dd6b9980..c560104df 100644
--- a/opm/parser/eclipse/EclipseState/Aquifer/NumericalAquifer/SingleNumericalAquifer.hpp
+++ b/opm/parser/eclipse/EclipseState/Aquifer/NumericalAquifer/SingleNumericalAquifer.hpp
@@ -28,7 +28,7 @@
 
 namespace Opm {
     class NNC;
-    class NNCdata;
+    struct NNCdata;
     class FieldPropsManager;
 
     struct AquiferCellProps {
diff --git a/tests/parser/RestartConfigTests.cpp b/tests/parser/RestartConfigTests.cpp
index 9008aa4c8..7e5eedd18 100644
--- a/tests/parser/RestartConfigTests.cpp
+++ b/tests/parser/RestartConfigTests.cpp
@@ -36,8 +36,6 @@ inline std::string fst( const std::pair< std::string, int >& p ) {
     return p.first;
 }
 
-constexpr std::pair<std::time_t, std::size_t> restart_info = std::make_pair(std::time_t{0}, std::size_t{0});
-
 const std::string grid = R"(
 RUNSPEC
 DIMENS
diff --git a/tests/parser/ScheduleTests.cpp b/tests/parser/ScheduleTests.cpp
index eaa74a7ae..46b0045ad 100644
--- a/tests/parser/ScheduleTests.cpp
+++ b/tests/parser/ScheduleTests.cpp
@@ -1326,21 +1326,6 @@ VAPPARS
 
 }
 
-
-BOOST_AUTO_TEST_CASE(createDeckWithOutOilVaporizationProperties) {
-    std::string input = R"(
-START             -- 0
-19 JUN 2007 /
-SCHEDULE
-DATES             -- 1
- 10  OKT 2008 /
-/
-)";
-
-    const auto& schedule = make_schedule(input);
-}
-
-
 BOOST_AUTO_TEST_CASE(changeBhpLimitInHistoryModeWithWeltarg) {
     std::string input = R"(
 START             -- 0