diff --git a/test_util/EclRegressionTest.cpp b/test_util/EclRegressionTest.cpp
index 0f8e333fa..744f0907b 100644
--- a/test_util/EclRegressionTest.cpp
+++ b/test_util/EclRegressionTest.cpp
@@ -895,18 +895,26 @@ void ECLRegressionTest::results_smry()
         std::vector<eclArrType> arrayType2 (keywords1.size(), REAL);
 
         if (integrationTest) {
+
+            auto isIntegrationKw = [](const std::string& kw)
+            {
+                static const auto kwlist = std::vector<std::string> {
+                   "WOPR", "WWPR", "WGPR", "WBHP",
+                   "SPR", "SPRD", "SPRDH", "SPRDF", "SPRDA",
+                };
+
+                const auto p = kw.find_first_of(':');
+                return std::find(kwlist.begin(), kwlist.end(), kw.substr(0, p)) != kwlist.end();
+            };
+
             std::vector<std::string> keywords;
 
-            for (size_t i = 0; i < keywords1.size(); i++) {
-                if (keywords1[i].substr(0,5) == "WOPR:" ||
-                    keywords1[i].substr(0,5) == "WWPR:" ||
-                    keywords1[i].substr(0,5) == "WGPR:" ||
-                    keywords1[i].substr(0,5) == "WBHP:" ||
-                    keywords1[i].substr(0,4) == "SPR:")  {
-                    auto search2 = std::find(keywords2.begin(), keywords2.end(), keywords1[i]);
-                    if (search2 != keywords2.end()) {
-                        keywords.push_back(keywords1[i]);
-                    }
+            for (const auto& kw : keywords1) {
+                if (! isIntegrationKw(kw)) { continue; }
+
+                auto search2 = std::find(keywords2.begin(), keywords2.end(), kw);
+                if (search2 != keywords2.end()) {
+                    keywords.push_back(kw);
                 }
             }