     }
     
     func _test10Evaluation_regex() throws {
+        guard sparqlBase != nil else { throw XCTSkip("SPARQL tests base location missing; set the KINEO_W3C_TEST_PATH environment variable") }
         let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("regex")
         try runEvaluationTests(inPath: path)
     }
     
     func _test10Evaluation_i18n() throws {
+        guard sparqlBase != nil else { throw XCTSkip("SPARQL tests base location missing; set the KINEO_W3C_TEST_PATH environment variable") }
         let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("i18n")
         try runEvaluationTests(inPath: path)
     }
     
     func _test10Evaluation_construct() throws {
+        guard sparqlBase != nil else { throw XCTSkip("SPARQL tests base location missing; set the KINEO_W3C_TEST_PATH environment variable") }
         let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("construct")
         try runEvaluationTests(inPath: path)
     }
     
     func _test10Evaluation_ask() throws {
+        guard sparqlBase != nil else { throw XCTSkip("SPARQL tests base location missing; set the KINEO_W3C_TEST_PATH environment variable") }
         let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("ask")
         try runEvaluationTests(inPath: path)
     }

    }
    
    func _test10Evaluation_basic() throws {
        let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("basic")
        let skip = Set([
            "http://www.w3.org/2001/sw/DataAccess/tests/data-r2/basic/manifest#term-6",

            "http://www.w3.org/2001/sw/DataAccess/tests/data-r2/reduced/manifest#reduced-1",
            "http://www.w3.org/2001/sw/DataAccess/tests/data-r2/reduced/manifest#reduced-2",
        ])
        guard sparqlBase != nil else { throw XCTSkip("SPARQL tests base location missing; set the KINEO_W3C_TEST_PATH environment variable") }
        let path = sparqlBase.appendingPathComponent("data-r2").appendingPathComponent("reduced")
        try runEvaluationTests(inPath: path, skip: skip)
    }
