diff --git a/span-stacktrace/src/main/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessor.java b/span-stacktrace/src/main/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessor.java
index 541e97e02..62fb9ff34 100644
--- a/span-stacktrace/src/main/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessor.java
+++ b/span-stacktrace/src/main/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessor.java
@@ -53,7 +53,7 @@ public boolean isOnEndingRequired() {
 
   @Override
   public void onEnding(ReadWriteSpan span) {
-    if (minSpanDurationNanos < 0 || span.getLatencyNanos() < minSpanDurationNanos) {
+    if (span.getLatencyNanos() < minSpanDurationNanos) {
       return;
     }
     if (span.getAttribute(SPAN_STACKTRACE) != null) {
diff --git a/span-stacktrace/src/test/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessorTest.java b/span-stacktrace/src/test/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessorTest.java
index 96385b8c5..3d6d4686d 100644
--- a/span-stacktrace/src/test/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessorTest.java
+++ b/span-stacktrace/src/test/java/io/opentelemetry/contrib/stacktrace/StackTraceSpanProcessorTest.java
@@ -6,6 +6,7 @@
 package io.opentelemetry.contrib.stacktrace;
 
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
 
 import io.opentelemetry.api.trace.Span;
 import io.opentelemetry.api.trace.SpanBuilder;
@@ -35,6 +36,12 @@ private static long msToNs(int ms) {
     return Duration.ofMillis(ms).toNanos();
   }
 
+  @Test
+  void tryInvalidMinDuration() {
+    assertThatCode(() -> new StackTraceSpanProcessor(-1, null))
+        .isInstanceOf(IllegalArgumentException.class);
+  }
+
   @Test
   void durationAndFiltering() {
     // on duration threshold
@@ -45,7 +52,7 @@ void durationAndFiltering() {
     checkSpanWithoutStackTrace(YesPredicate.class, "2ms", msToNs(1));
 
     // filtering out span
-    checkSpanWithoutStackTrace(NoPredicate.class, "1ms", 20);
+    checkSpanWithoutStackTrace(NoPredicate.class, "1ms", msToNs(20));
   }
 
   public static class YesPredicate implements Predicate<ReadableSpan> {
@@ -99,7 +106,8 @@ private static void checkSpanWithStackTrace(String minDurationString, long spanD
   }
 
   private static void checkSpanWithoutStackTrace(
-      Class<? extends Predicate<?>> predicateClass, String minDurationString,
+      Class<? extends Predicate<?>> predicateClass,
+      String minDurationString,
       long spanDurationNanos) {
     checkSpan(
         predicateClass,
@@ -120,21 +128,23 @@ private static void checkSpan(
     InMemorySpanExporter spansExporter = InMemorySpanExporter.create();
 
     AutoConfiguredOpenTelemetrySdkBuilder sdkBuilder = AutoConfiguredOpenTelemetrySdk.builder();
-    sdkBuilder.addPropertiesSupplier(() -> {
-      Map<String, String> configMap = new HashMap<>();
-
-      configMap.put("otel.metrics.exporter", "none");
-      configMap.put("otel.traces.exporter", "logging");
-      configMap.put("otel.logs.exporter", "none");
-
-      if (minDurationString != null) {
-        configMap.put("otel.java.experimental.span-stacktrace.min.duration", minDurationString);
-      }
-      if (predicateClass != null) {
-        configMap.put("otel.java.experimental.span-stacktrace.filter", predicateClass.getName());
-      }
-      return configMap;
-    });
+    sdkBuilder.addPropertiesSupplier(
+        () -> {
+          Map<String, String> configMap = new HashMap<>();
+
+          configMap.put("otel.metrics.exporter", "none");
+          configMap.put("otel.traces.exporter", "logging");
+          configMap.put("otel.logs.exporter", "none");
+
+          if (minDurationString != null) {
+            configMap.put("otel.java.experimental.span-stacktrace.min.duration", minDurationString);
+          }
+          if (predicateClass != null) {
+            configMap.put(
+                "otel.java.experimental.span-stacktrace.filter", predicateClass.getName());
+          }
+          return configMap;
+        });
     // duplicate export to our in-memory span exporter
     sdkBuilder.addSpanExporterCustomizer(
         (exporter, config) -> SpanExporter.composite(exporter, spansExporter));