diff --git a/.idea/codeStyles/codeStyleConfig.xml b/.idea/codeStyles/codeStyleConfig.xml
index 6e6eec114..79ee123c2 100644
--- a/.idea/codeStyles/codeStyleConfig.xml
+++ b/.idea/codeStyles/codeStyleConfig.xml
@@ -1,6 +1,5 @@
 <component name="ProjectCodeStyleConfiguration">
   <state>
     <option name="USE_PER_PROJECT_SETTINGS" value="true" />
-    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
   </state>
 </component>
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 902329bba..14fbe2f2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ We use [semantic versioning](http://semver.org/):
 - [feature] Use git.commit.id from git.properties instead of branch and timestamp
 - [breaking change] Reduce XML report size by only including source file coverage, no class coverage
 - [feature] New option `--ignore-uncovered-classes` to further reduce size of XML reports
+- [fix] converter produces duplicate test entries for testwise coverage
 
 # 15.5.0
 - [feature] add TIA client library for integrating TIA in your custom test framework
diff --git a/agent/src/test/java/com/teamscale/jacoco/agent/convert/ConverterTest.java b/agent/src/test/java/com/teamscale/jacoco/agent/convert/ConverterTest.java
index 4f6fb819d..a93b715b7 100644
--- a/agent/src/test/java/com/teamscale/jacoco/agent/convert/ConverterTest.java
+++ b/agent/src/test/java/com/teamscale/jacoco/agent/convert/ConverterTest.java
@@ -5,6 +5,9 @@
 import org.junit.jupiter.api.io.TempDir;
 
 import java.io.File;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.file.Files;
 import java.util.Collections;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -33,4 +36,39 @@ public void testSmokeTest(@TempDir File tempDir) throws Exception {
 		assertThat(xml).isNotEmpty().contains("<package").contains("<sourcefile").contains("<counter").contains("TestClass");
 	}
 
+	/**
+	 * Ensures that running the converter on valid input does not yield any errors and produces a coverage XML report.
+	 */
+	@Test
+	public void testTestwiseCoverageSmokeTest(@TempDir File tempDir) throws Exception {
+		File inputDir = new File(tempDir, "input");
+		inputDir.mkdir();
+		copyResourceTo("coverage-testwise.exec", inputDir);
+		copyResourceTo("test-list.json", inputDir);
+		copyResourceTo("test-execution.json", inputDir);
+		File classFile = new File(getClass().getResource("classes.zip").toURI());
+		File outputFile = new File(tempDir, "testwise-coverage.json");
+
+		ConvertCommand arguments = new ConvertCommand();
+		arguments.inputFiles = Collections.singletonList(inputDir.getAbsolutePath());
+		arguments.outputFile = outputFile.getAbsolutePath();
+		arguments.classDirectoriesOrZips = Collections.singletonList(classFile.getAbsolutePath());
+
+		new Converter(arguments).runTestwiseCoverageReportGeneration();
+
+		String json = FileSystemUtils.readFileUTF8(new File(tempDir, "testwise-coverage-1.json"));
+		assertThat(json).
+				contains(
+						"\"uniformPath\": \"[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testFunctions(org.conqat.lib.cqddl.CQDDLTest)]\"")
+				.contains(
+						"\"uniformPath\": \"[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testDirectObjectInsertion(org.conqat.lib.cqddl.CQDDLTest)]\"")
+				.contains("\"uniformPath\": \"[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testKeyAbbreviations(org.conqat.lib.cqddl.CQDDLTest)]\"")
+				.contains("\"uniformPath\": \"[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testKeyAbbreviations(org.conqat.lib.cqddl.CQDDLTest)]\"")
+				.contains("\"result\": \"PASSED\"").contains("\"duration\": 1234").contains("\"coveredLines\": \"33,46-47");
+	}
+
+	private void copyResourceTo(String name, File targetDir) throws URISyntaxException, IOException {
+		File execFile = new File(getClass().getResource(name).toURI());
+		Files.copy(execFile.toPath(), new File(targetDir, name).toPath());
+	}
 }
diff --git a/agent/src/test/resources/com/teamscale/jacoco/agent/convert/classes.zip b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/classes.zip
new file mode 100644
index 000000000..b85b12407
Binary files /dev/null and b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/classes.zip differ
diff --git a/agent/src/test/resources/com/teamscale/jacoco/agent/convert/coverage-testwise.exec b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/coverage-testwise.exec
new file mode 100644
index 000000000..8deb4aa25
Binary files /dev/null and b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/coverage-testwise.exec differ
diff --git a/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-execution.json b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-execution.json
new file mode 100644
index 000000000..3b5ffd23b
--- /dev/null
+++ b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-execution.json
@@ -0,0 +1,10 @@
+[
+  {
+    "uniformPath": "[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testDirectObjectInsertion(org.conqat.lib.cqddl.CQDDLTest)]"
+  },
+  {
+    "uniformPath": "[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testFunctions(org.conqat.lib.cqddl.CQDDLTest)]",
+    "duration": 1234,
+    "result": "PASSED"
+  }
+]
diff --git a/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-list.json b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-list.json
new file mode 100644
index 000000000..fd7bea416
--- /dev/null
+++ b/agent/src/test/resources/com/teamscale/jacoco/agent/convert/test-list.json
@@ -0,0 +1,8 @@
+[
+  {
+    "uniformPath": "[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testDirectObjectInsertion(org.conqat.lib.cqddl.CQDDLTest)]"
+  },
+  {
+    "uniformPath": "[engine:junit-vintage]/[runner:org.conqat.lib.cqddl.CQDDLTest]/[test:testFunctions(org.conqat.lib.cqddl.CQDDLTest)]"
+  }
+]
diff --git a/report-generator/src/main/java/com/teamscale/report/testwise/model/factory/TestInfoFactory.java b/report-generator/src/main/java/com/teamscale/report/testwise/model/factory/TestInfoFactory.java
index a6393ef6b..0895630a9 100644
--- a/report-generator/src/main/java/com/teamscale/report/testwise/model/factory/TestInfoFactory.java
+++ b/report-generator/src/main/java/com/teamscale/report/testwise/model/factory/TestInfoFactory.java
@@ -27,7 +27,7 @@ public class TestInfoFactory {
 	private Map<String, TestExecution> testExecutionsMap = new HashMap<>();
 
 	/** Holds all uniform paths for tests that have been written to the outputFile. */
-	private final Set<String> uniformPathsWithCoverage = new HashSet<>();
+	private final Set<String> processedTestUniformPaths = new HashSet<>();
 
 	public TestInfoFactory(List<TestDetails> testDetails, List<TestExecution> testExecutions) {
 		for (TestDetails testDetail : testDetails) {
@@ -44,7 +44,7 @@ public TestInfoFactory(List<TestDetails> testDetails, List<TestExecution> testEx
 	 */
 	public TestInfo createFor(TestCoverageBuilder testCoverageBuilder) {
 		String resolvedUniformPath = resolveUniformPath(testCoverageBuilder.getUniformPath());
-		uniformPathsWithCoverage.add(resolvedUniformPath);
+		processedTestUniformPaths.add(resolvedUniformPath);
 
 		TestInfoBuilder container = new TestInfoBuilder(resolvedUniformPath);
 		container.setCoverage(testCoverageBuilder);
@@ -65,11 +65,20 @@ public TestInfo createFor(TestCoverageBuilder testCoverageBuilder) {
 	public List<TestInfo> createTestInfosWithoutCoverage() {
 		ArrayList<TestInfo> results = new ArrayList<>();
 		for (TestDetails testDetails : testDetailsMap.values()) {
-			if (uniformPathsWithCoverage.contains(testDetails.uniformPath)) {
+			if (!processedTestUniformPaths.contains(testDetails.uniformPath)) {
 				TestInfoBuilder testInfo = new TestInfoBuilder(testDetails.uniformPath);
 				testInfo.setDetails(testDetails);
 				testInfo.setExecution(testExecutionsMap.get(testDetails.uniformPath));
 				results.add(testInfo.build());
+				processedTestUniformPaths.add(testDetails.uniformPath);
+			}
+		}
+		for (TestExecution testExecution : testExecutionsMap.values()) {
+			if (!processedTestUniformPaths.contains(testExecution.getUniformPath())) {
+				System.err.println("Test " + testExecution.getUniformPath() + " was executed but no coverage was found. " +
+						"Please make sure that you did provide all relevant exec files and that the test IDs passed to " +
+						"the agent match the ones from the provided test execution list.");
+				processedTestUniformPaths.add(testExecution.getUniformPath());
 			}
 		}
 		return results;