diff --git a/core/test/com/google/inject/internal/ConstructionContextTest.java b/core/test/com/google/inject/internal/ConstructionContextTest.java
new file mode 100644
index 0000000000..fd17463bb7
--- /dev/null
+++ b/core/test/com/google/inject/internal/ConstructionContextTest.java
@@ -0,0 +1,72 @@
+package com.google.inject.internal;
+
+import org.junit.rules.Timeout;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.nullValue;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.mockStatic;
+import static org.hamcrest.Matchers.is;
+
+public class ConstructionContextTest {
+
+    @Rule()
+    public Timeout timeoutRule = Timeout.seconds(5);
+
+    private final InjectorImpl.InjectorOptions injectorImplInjectorOptionsMock = mock(InjectorImpl.InjectorOptions.class);
+
+    @Rule()
+    public ExpectedException thrown = ExpectedException.none();
+
+    //Sapient generated method id: ${fd29cd0f-f5b1-30b4-8cda-768672f68aba}, hash: E66F5CF26FE199A2F2B2C170E4932242
+    @Test()
+    public void removeCurrentReferenceTest() {
+        //Arrange Statement(s)
+        ConstructionContext<Object> target = new ConstructionContext<>();
+        //Act Statement(s)
+        target.removeCurrentReference();
+        //Assert statement(s)
+        assertThat(target.getCurrentReference(), is(nullValue()));
+    }
+
+    //Sapient generated method id: ${5af195be-742d-303b-b6b2-671a9ad7deb4}, hash: F27F08A7B477319B751779BD074389FA
+    @Test()
+    public void startConstructionTest() {
+        //Arrange Statement(s)
+        ConstructionContext<Object> target = new ConstructionContext<>();
+        //Act Statement(s)
+        target.startConstruction();
+        //Assert statement(s)
+        assertThat(target.isConstructing(), equalTo(Boolean.TRUE));
+    }
+
+    //Sapient generated method id: ${28013cdd-b521-384f-a2bb-6f2e5d85212e}, hash: DE26EFA9360DD0B6BB3AD7E932E207A3
+    @Test()
+    public void finishConstructionTest() {
+        //Arrange Statement(s)
+        ConstructionContext<Object> target = new ConstructionContext<>();
+        //Act Statement(s)
+        target.finishConstruction();
+        //Assert statement(s)
+        assertThat(target.isConstructing(), equalTo(Boolean.FALSE));
+    }
+
+    //Sapient generated method id: ${55d4b4e7-0019-356b-b29b-19c11b0be872}, hash: E622E7100DD2C222C169C3EC6E03DB04
+    @Test()
+    public void setProxyDelegatesWhenInvocationHandlersIsNull() {
+        /* Branches:
+         * (invocationHandlers != null) : false
+         */
+        //Arrange Statement(s)
+        ConstructionContext<Object> target = new ConstructionContext<>();
+        Object object = new Object();
+        //Act Statement(s)
+        target.setProxyDelegates(object);
+    }
+}
diff --git a/core/test/com/google/inject/internal/ConstructorInjectorTest.java b/core/test/com/google/inject/internal/ConstructorInjectorTest.java
new file mode 100644
index 0000000000..c8100ed41e
--- /dev/null
+++ b/core/test/com/google/inject/internal/ConstructorInjectorTest.java
@@ -0,0 +1,172 @@
+package com.google.inject.internal;
+
+import org.junit.rules.Timeout;
+import org.junit.Rule;
+import org.junit.Test;
+
+import java.lang.reflect.InvocationTargetException;
+
+import org.junit.rules.ExpectedException;
+
+import java.util.HashSet;
+
+import com.google.inject.Key;
+
+import java.lang.reflect.Constructor;
+
+import com.google.inject.TypeLiteral;
+
+import java.util.Set;
+
+import com.google.inject.spi.Dependency;
+import org.mockito.MockedStatic;
+import com.google.inject.spi.InjectionPoint;
+
+import static org.mockito.Mockito.doNothing;
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.times;
+import static org.hamcrest.Matchers.is;
+import static org.mockito.ArgumentMatchers.any;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.atLeast;
+import static org.mockito.Mockito.mockStatic;
+
+public class ConstructorInjectorTest {
+
+    @Rule()
+    public Timeout timeoutRule = Timeout.seconds(5);
+
+    private final ConstructionProxy<java.lang.Object> constructionProxyMock = mock(ConstructionProxy.class, "ConstructionProxy<Object> constructionProxy");
+
+    private final ConstructionContext<java.lang.Object> constructionContextMock = mock(ConstructionContext.class);
+
+    private final Constructor constructorMock = mock(Constructor.class);
+
+    private final InternalContext contextMock = mock(InternalContext.class);
+
+    private final Dependency<?> dependencyMock = mock(Dependency.class);
+
+    private final InjectorImpl.InjectorOptions injectorImplInjectorOptionsMock = mock(InjectorImpl.InjectorOptions.class);
+
+    private final Key keyMock = mock(Key.class);
+
+    private final MembersInjectorImpl<java.lang.Object> membersInjectorImplMock = mock(MembersInjectorImpl.class);
+
+    private final ProvisionListenerStackCallback<java.lang.Object> provisionListenerStackCallbackMock = mock(ProvisionListenerStackCallback.class);
+
+    private final TypeLiteral typeLiteralMock = mock(TypeLiteral.class);
+
+    @Rule()
+    public ExpectedException thrown = ExpectedException.none();
+
+    //Sapient generated method id: ${49f22cac-3604-3497-90db-d26edb0e7397}, hash: DCD02567C05D90BE46F869ECA4B0F33A
+    @Test()
+    public void constructWhenConstructionContextIsConstructing() throws InternalProvisionException, InvocationTargetException {
+        /* Branches:
+         * (constructionContext.isConstructing()) : true
+         */
+        //Arrange Statement(s)
+        doReturn(injectorImplInjectorOptionsMock).when(contextMock).getInjectorOptions();
+        doReturn(typeLiteralMock).when(keyMock).getTypeLiteral();
+        doReturn(Object.class).when(typeLiteralMock).getRawType();
+        Set<InjectionPoint> injectionPointSet = new HashSet<>();
+        SingleParameterInjector<?>[] singleParameterInjectorArray = new SingleParameterInjector[]{};
+        ConstructorInjector<java.lang.Object> target = new ConstructorInjector(injectionPointSet, constructionProxyMock, singleParameterInjectorArray, membersInjectorImplMock);
+        doReturn(constructionContextMock).when(contextMock).getConstructionContext(target);
+        doReturn(true).when(constructionContextMock).isConstructing();
+        java.lang.Object object = new java.lang.Object();
+        doReturn(object).when(constructionContextMock).createProxy(injectorImplInjectorOptionsMock, java.lang.Object.class);
+        Dependency dependency = Dependency.get(keyMock);
+        //Act Statement(s)
+        java.lang.Object result = target.construct(contextMock, dependency, provisionListenerStackCallbackMock);
+        //Assert statement(s)
+        assertThat(result, equalTo(object));
+        verify(contextMock).getInjectorOptions();
+        verify(keyMock).getTypeLiteral();
+        verify(typeLiteralMock).getRawType();
+        verify(contextMock).getConstructionContext(target);
+        verify(constructionContextMock).isConstructing();
+        verify(constructionContextMock).createProxy(injectorImplInjectorOptionsMock, java.lang.Object.class);
+    }
+
+    //Sapient generated method id: ${4d517ada-89b7-3a9e-9289-6ee0971952e5}, hash: F273C0D0DD99D49493C6E61964D4030A
+    @Test()
+    public void constructWhenContextGetInjectorOptionsNotDisableCircularProxies() throws InternalProvisionException, InvocationTargetException {
+        /* Branches:
+         * (constructionContext.isConstructing()) : false
+         * (t != null) : true
+         * (context.getInjectorOptions().disableCircularProxies) : false
+         */
+        //Arrange Statement(s)
+        doReturn(injectorImplInjectorOptionsMock).when(contextMock).getInjectorOptions();
+        Set<InjectionPoint> injectionPointSet = new HashSet<>();
+        SingleParameterInjector<?>[] singleParameterInjectorArray = new SingleParameterInjector[]{};
+        ConstructorInjector<java.lang.Object> target = new ConstructorInjector(injectionPointSet, constructionProxyMock, singleParameterInjectorArray, membersInjectorImplMock);
+        doReturn(constructionContextMock).when(contextMock).getConstructionContext(target);
+        doReturn(false).when(constructionContextMock).isConstructing();
+        java.lang.Object object = new java.lang.Object();
+        doReturn(object).when(constructionContextMock).getCurrentReference();
+        //Act Statement(s)
+        java.lang.Object result = target.construct(contextMock, dependencyMock, provisionListenerStackCallbackMock);
+        //Assert statement(s)
+        assertThat(result, equalTo(object));
+        verify(contextMock).getInjectorOptions();
+        verify(contextMock).getConstructionContext(target);
+        verify(constructionContextMock).isConstructing();
+        verify(constructionContextMock).getCurrentReference();
+    }
+
+    //Sapient generated method id: ${5518bfd1-919d-3a21-9890-4da022deb59b}, hash: A540D7A50620E5161323DA156AC70484
+    @Test()
+    public void constructWhenProvisionCallbackIsNull() throws InternalProvisionException, InvocationTargetException {
+        /* Branches:
+         * (constructionContext.isConstructing()) : false
+         * (t != null) : false
+         * (provisionCallback == null) : true
+         */
+        //Arrange Statement(s)
+        MembersInjectorImpl<java.lang.Object> localMembersInjectorMock = mock(MembersInjectorImpl.class);
+        InternalContext internalContextMock = mock(InternalContext.class);
+        try (MockedStatic<SingleParameterInjector> singleParameterInjector = mockStatic(SingleParameterInjector.class)) {
+            java.lang.Object object = new java.lang.Object();
+            doNothing().when(localMembersInjectorMock).injectMembers(object, internalContextMock, false);
+            doNothing().when(localMembersInjectorMock).notifyListeners(object);
+            java.lang.Object[] objectArray = new java.lang.Object[]{};
+            SingleParameterInjector<?>[] singleParameterInjectorArray = new SingleParameterInjector[]{};
+            singleParameterInjector.when(() -> SingleParameterInjector.getAll(internalContextMock, singleParameterInjectorArray)).thenReturn(objectArray);
+            Set<InjectionPoint> injectionPointSet = new HashSet<>();
+            ConstructorInjector<java.lang.Object> target = new ConstructorInjector(injectionPointSet, constructionProxyMock, singleParameterInjectorArray, localMembersInjectorMock);
+            doReturn(object).when(constructionProxyMock).newInstance(objectArray);
+            doReturn(constructionContextMock).when(internalContextMock).getConstructionContext(target);
+            doReturn(false).when(constructionContextMock).isConstructing();
+            doReturn(null).when(constructionContextMock).getCurrentReference();
+            doNothing().when(constructionContextMock).startConstruction();
+            doNothing().when(constructionContextMock).setProxyDelegates(object);
+            doNothing().when(constructionContextMock).finishConstruction();
+            doNothing().when(constructionContextMock).setCurrentReference(object);
+            doNothing().when(constructionContextMock).removeCurrentReference();
+            ProvisionListenerStackCallback<java.lang.Object> provisionListenerStackCallback = null;
+            //Act Statement(s)
+            java.lang.Object result = target.construct(internalContextMock, dependencyMock, provisionListenerStackCallback);
+            //Assert statement(s)
+            assertThat(result, equalTo(object));
+            verify(localMembersInjectorMock).injectMembers(object, internalContextMock, false);
+            verify(localMembersInjectorMock).notifyListeners(object);
+            singleParameterInjector.verify(() -> SingleParameterInjector.getAll(internalContextMock, singleParameterInjectorArray), atLeast(1));
+            verify(constructionProxyMock).newInstance(objectArray);
+            verify(internalContextMock).getConstructionContext(target);
+            verify(constructionContextMock).isConstructing();
+            verify(constructionContextMock).getCurrentReference();
+            verify(constructionContextMock).startConstruction();
+            verify(constructionContextMock).setProxyDelegates(object);
+            verify(constructionContextMock, times(2)).finishConstruction();
+            verify(constructionContextMock).setCurrentReference(object);
+            verify(constructionContextMock).removeCurrentReference();
+        }
+    }
+}
diff --git a/pom.xml b/pom.xml
index 91130794f9..7ced74aaf8 100644
--- a/pom.xml
+++ b/pom.xml
@@ -186,6 +186,38 @@ See the Apache License Version 2.0 for the specific language governing permissio
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
     </dependency>
+
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-core</artifactId>
+      <version>5.7.0</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.mockito</groupId>
+      <artifactId>mockito-inline</artifactId>
+      <version>5.2.0</version>
+      <scope>test</scope>
+    </dependency>
+
+    <!-- byte-buddy is an optional dependency. Mockito brings it, but an old version can cause problems.
+      We need at least 1.12.9 -->
+    <dependency>
+      <groupId>net.bytebuddy</groupId>
+      <artifactId>byte-buddy</artifactId>
+      <version>1.14.4</version>
+      <scope>test</scope>
+    </dependency>
+
+    <dependency>
+      <groupId>org.hamcrest</groupId>
+      <artifactId>hamcrest</artifactId>
+      <version>2.2</version>
+      <scope>test</scope>
+    </dependency>
+
+
   </dependencies>
 
   <build>