diff --git a/api/src/main/java/io/opentelemetry/api/metrics/DefaultMeterProvider.java b/api/src/main/java/io/opentelemetry/api/metrics/DefaultMeterProvider.java
index 4516c098dc5..34b65ce2083 100644
--- a/api/src/main/java/io/opentelemetry/api/metrics/DefaultMeterProvider.java
+++ b/api/src/main/java/io/opentelemetry/api/metrics/DefaultMeterProvider.java
@@ -6,6 +6,7 @@
 package io.opentelemetry.api.metrics;
 
 import javax.annotation.concurrent.ThreadSafe;
+import java.util.Objects;
 
 @ThreadSafe
 final class DefaultMeterProvider implements MeterProvider {
@@ -23,6 +24,7 @@ public Meter get(String instrumentationName) {
 
   @Override
   public Meter get(String instrumentationName, String instrumentationVersion) {
+    Objects.requireNonNull(instrumentationName);
     return Meter.getDefault();
   }
 
diff --git a/api/src/main/java/io/opentelemetry/api/trace/DefaultTracerProvider.java b/api/src/main/java/io/opentelemetry/api/trace/DefaultTracerProvider.java
index 7cb4219efc8..4df177a382e 100644
--- a/api/src/main/java/io/opentelemetry/api/trace/DefaultTracerProvider.java
+++ b/api/src/main/java/io/opentelemetry/api/trace/DefaultTracerProvider.java
@@ -6,6 +6,7 @@
 package io.opentelemetry.api.trace;
 
 import javax.annotation.concurrent.ThreadSafe;
+import java.util.Objects;
 
 @ThreadSafe
 class DefaultTracerProvider implements TracerProvider {
@@ -23,6 +24,7 @@ public Tracer get(String instrumentationName) {
 
   @Override
   public Tracer get(String instrumentationName, String instrumentationVersion) {
+    Objects.requireNonNull(instrumentationName);
     return Tracer.getDefault();
   }
 
diff --git a/api/src/test/java/io/opentelemetry/api/metrics/DefaultMeterProviderTest.java b/api/src/test/java/io/opentelemetry/api/metrics/DefaultMeterProviderTest.java
new file mode 100644
index 00000000000..189a55b7911
--- /dev/null
+++ b/api/src/test/java/io/opentelemetry/api/metrics/DefaultMeterProviderTest.java
@@ -0,0 +1,14 @@
+package io.opentelemetry.api.metrics;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+class DefaultMeterProviderTest {
+
+  @Test
+  void rejectsNullInstrumentationName() {
+    assertThrows(NullPointerException.class, () -> DefaultMeterProvider.getInstance().get(null));
+    assertThrows(NullPointerException.class, () -> DefaultMeterProvider.getInstance().get(null, "1.0.0"));
+  }
+}
diff --git a/api/src/test/java/io/opentelemetry/api/trace/DefaultTracerProviderTest.java b/api/src/test/java/io/opentelemetry/api/trace/DefaultTracerProviderTest.java
new file mode 100644
index 00000000000..d9c3853a49f
--- /dev/null
+++ b/api/src/test/java/io/opentelemetry/api/trace/DefaultTracerProviderTest.java
@@ -0,0 +1,14 @@
+package io.opentelemetry.api.trace;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+class DefaultTracerProviderTest {
+
+  @Test
+  void rejectsNullInstrumentationName() {
+    assertThrows(NullPointerException.class, () -> DefaultTracerProvider.getInstance().get(null));
+    assertThrows(NullPointerException.class, () -> DefaultTracerProvider.getInstance().get(null, "1.0.0"));
+  }
+}
diff --git a/sdk/metrics/src/test/java/io/opentelemetry/sdk/metrics/MeterSdkRegistryTest.java b/sdk/metrics/src/test/java/io/opentelemetry/sdk/metrics/MeterSdkRegistryTest.java
index fa7dabaa247..bd79886822c 100644
--- a/sdk/metrics/src/test/java/io/opentelemetry/sdk/metrics/MeterSdkRegistryTest.java
+++ b/sdk/metrics/src/test/java/io/opentelemetry/sdk/metrics/MeterSdkRegistryTest.java
@@ -101,4 +101,10 @@ void metricProducer_GetAllMetrics() {
                 Collections.singletonList(
                     LongPoint.create(testClock.now(), testClock.now(), Labels.empty(), 10))));
   }
+
+  @Test
+  void rejectsNullInstrumentationName() {
+    assertThrows(NullPointerException.class, () -> meterProvider.get(null));
+    assertThrows(NullPointerException.class, () -> meterProvider.get(null, "1.0.0"));
+  }
 }
diff --git a/sdk/tracing/src/test/java/io/opentelemetry/sdk/trace/TracerSdkProviderTest.java b/sdk/tracing/src/test/java/io/opentelemetry/sdk/trace/TracerSdkProviderTest.java
index a72cb6926d2..3514ef38a1d 100644
--- a/sdk/tracing/src/test/java/io/opentelemetry/sdk/trace/TracerSdkProviderTest.java
+++ b/sdk/tracing/src/test/java/io/opentelemetry/sdk/trace/TracerSdkProviderTest.java
@@ -134,4 +134,10 @@ void returnNoopSpanAfterShutdown() {
     assertThat(span.getSpanContext().isValid()).isFalse();
     span.end();
   }
+
+  @Test
+  void rejectsNullInstrumentationName() {
+    assertThrows(NullPointerException.class, () -> tracerFactory.get(null));
+    assertThrows(NullPointerException.class, () -> tracerFactory.get(null, "1.0.0"));
+  }
 }